ErrLookup › dotnet/maui

dotnet/maui

.NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop. · C# · 5,630 source files

Analyzed at f377ff1c5e on 2026-08-13. 437 documented errors.

Code / MessageTypeSeverityTags
Error: Building dotnet-samples with NativeAOT is only suppor
exception error nativeaot, configuration, cake, build, maui-samples
Some tests failed. Check the logs or test results.
exception error tests, aggregate, cake, test-runner
PowerShell Core (pwsh) is not installed. Please install it t
exception error pwsh, powershell, environment, non-windows, dependency
PowerShell Core (pwsh) is required on non-Windows platforms.
exception error pwsh, powershell, non-windows, environment, dependency
Unable to find Visual Studio!
exception error visual-studio, vswhere, windows, environment, dependency
Environment variable 'ANDROID_SDK_ROOT' or 'ANDROID_HOME' mu
exception error android, android-sdk, environment, env-var, dependency
Failed to download the package.
exception error nuget, download, network, package, dependency
ActivateApplication failed (HRESULT=0x{0:X8})
exception error windows, packaged-app, com, win32, msix, aumid
JAVA_HOME environment variable isn't set. Set it to your JDK
exception error android, java, java-home, environment, dependency, jdk
UI Test application path not specified.
exception error android, ui-tests, test-app, build-artifact, cake
Unexpected platform (expected: android) in device: {deviceDe
exception error android, device-descriptor, validation, config
Unexpected device type (expected: device|emulator) in device
exception error android, device-descriptor, validation, config
The emulator did not finish booting in time.
exception error android, emulator, boot-timeout, adb, ci
All key generation methods failed. Unable to create ADB keys
exception error android, adb, adb-keys, openssl, crypto, authorization
ADB keys were not created successfully.
exception error android, adb, adb-keys, filesystem, verification
Failed to push ADB keys after multiple attempts.
exception error android, adb, adb-keys, push, retry, authorization
UI Test application path not specified.
exception error catalyst, macos, ui-tests, test-app, build-artifact, cake
No application was found in the specified directories.
exception error test-app, build-artifact, search, config, tfm, rid
Could not find total or inconclusive test count in test resu
exception error test-results, xml, xunit, validation, xmlpeek
All tests are marked inconclusive, no tests ran. There is pr
exception error test-results, inconclusive, xunit, test-discovery, validation
No test assembly found.
exception error cake, reflection, build-artifacts, device-tests, maui
No test results found.
exception error cake, test-results, xharness, ios, device-tests
No device was found to install the app on. See the Setup met
exception error cake, ios, xharness, physical-device, udid
UI Test application path not specified.
exception error cake, ios, build-artifacts, uitests, configuration
Error: Running UI tests with NativeAOT is only supported in
exception error cake, ios, nativeaot, configuration, build
No device was found to run tests on.
exception error cake, ios, xharness, physical-device, udid
No simulator was found to run tests on.
exception error cake, ios, simulator, xharness, udid
No devices found
exception error cake, ios, physical-device, xharness, usb
No devices found for version {version}
exception error cake, ios, physical-device, version-mismatch, xharness
Cert {certificateThumbprint} exists in LocalMachine\TrustedP
exception error cake, windows, certificate, msix, elevation, x509
Failed to install signing cert into LocalMachine\TrustedPeop
exception error cake, windows, certificate, msix, elevation, first-run
Error: Couldn't find .cer or .msix file
exception error cake, windows, msix, build-artifacts, packaging, certificate
Failed to install app MSIX (exit code {installExit}): {msixP
exception error cake, windows, msix, appx, powershell, install
Category discovery run did not complete successfully
exception error cake, windows, winui, packaged, app-activation, timeout
Test categories file was not created during discovery phase
exception error cake, windows, winui, packaged, test-categories, discovery
No test result files found. All test processes may have cras
exception error cake, windows, test-results, validation, device-tests
Some test categories failed to complete: {string.Join(", ",
exception error cake, windows, test-results, categories, timeout, device-tests
At least {failed} test(s) failed in {System.IO.Path.GetFileN
exception error cake, windows, test-results, xunit, assertion-failure, device-tests
If no app was specified, an app must be provided.
exception error cake, build, windows, configuration, test-runner
Error: Couldn't find .exe file
exception error cake, build, windows, path-resolution, configuration
Unable to find the required services. Please add all the req
exception error blazor, blazorwebview, maui, android, dependency-injection, service-registration
Can't start BlazorWebView without native web view instance.
exception error blazor, blazorwebview, maui, android, handler-lifecycle, platform-view
RootComponent requires a value for its Selector property, bu
exception error blazor, blazorwebview, maui, rootcomponent, validation, xaml
RootComponent requires a value for its ComponentType propert
exception error blazor, blazorwebview, maui, rootcomponent, validation, xaml
Can't start BlazorWebView without platform web view instance
exception error blazor, blazorwebview, maui, tizen, handler-lifecycle, platform-view
Can't start BlazorWebView without native web view instance.
exception error blazor, blazorwebview, maui, windows, handler-lifecycle, platform-view, webview2
Can't start BlazorWebView without native web view instance.
exception error blazor, blazorwebview, maui, ios, handler-lifecycle, platform-view, wkwebview
Unable to find the required services. Please add all the req
exception error blazor, blazorwebview, maui, ios, dependency-injection, service-registration
Unable to find the required services. Please add all the req
exception error blazor, blazorwebview, winforms, dependency-injection, service-registration, webview2
Unable to find the required services. Please add all the req
exception error blazor, blazorwebview, wpf, dependency-injection, service-registration, webview2
Unable to find the required services. Please add all the req
exception error blazor, blazorwebview, maui, windows, dependency-injection, service-registration, webview2
'selector' cannot be null or whitespace.
exception error blazor, blazorwebview, winforms, rootcomponent, validation, constructor
There is no root component with selector '{selector}'.
exception error blazor, blazorwebview, winforms, rootcomponent, validation, collection
RootComponent requires a value for its Selector property, bu
exception error blazor, blazorwebview, wpf, rootcomponent, validation, xaml
RootComponent requires a value for its ComponentType propert
exception error blazor, blazorwebview, wpf, rootcomponent, validation, xaml
ItemTemplate count has exceeded the limit of {ViewTypeCount}
exception error maui, android, listview, datatemplate, datatemplateselector, legacy-renderers, viewtypecount
View for cell must implement INativeElementView to enable re
exception error android, listview, recycling, renderer, xamarin-forms
Element is not of type CheckBox
exception error android, renderer, checkbox, type-mismatch, registration
Activity OnCreate was not called prior to loading the applic
exception critical android, activity, lifecycle, oncreate, initialization
ToolbarResource must be set to a androidx.appcompat.widget.T
exception error android, toolbar, layout-inflation, androidx, appcompat
Call Forms.Init (Activity, Bundle) before this
exception critical android, forms-init, initialization, lifecycle
Element is not of type ImageButton
exception error android, renderer, imagebutton, type-mismatch, registration
This should never happen, please file a bug
exception error android, navigationpage, insertpagebefore, internal-state, assertion
call Forms.Init() before this
exception critical android, forms-init, fragment, embedding, initialization
InsertPageBefore is not supported globally on Android, pleas
exception error android, navigation, insertpagebefore, navigationpage, platform
PopAsync is not supported globally on Android, please use a
exception error android, navigation, popasync, navigationpage, platform
PopToRootAsync is not supported globally on Android, please
exception error android, navigation, poptorootasync, navigationpage, platform
PushAsync is not supported globally on Android, please use a
exception error android, navigation, pushasync, navigationpage, platform
RemovePage is not supported globally on Android, please use
exception error android, navigation, removepage, navigationpage, platform
Invalid Uri
exception error android, uri, ms-appdata, file-path, platform
uri
exception error android, uri, ms-appdata, scheme, platform
element must be of type RadioButton
exception error android, renderer, radiobutton, type-mismatch, registration
ViewCell must have a {nameof(cell.View)}
exception error android, viewcell, listview, xaml, renderer
Can't set CarouselView to position {carouselPosition}. Items
exception error android, carouselview, position, itemssource, collectionview
IItemsViewSource is empty
exception error android, collectionview, emptysource, bounds-check, internal
{nameof(element)} must be of type {typeof(IndicatorView).Nam
exception error android, renderer, type-mismatch, collectionview, maui-compat
{nameof(element)} must be of type {typeof(ItemsView).Name}
exception error android, renderer, type-mismatch, collectionview, carouselview, maui-compat
ReturnType {returnType} not supported
exception error android, renderer, enum, entry, not-implemented, maui-compat
{nameof(element)} must be of type {nameof(Button)}
exception error android, renderer, type-mismatch, button, fast-renderer, maui-compat
Element must be of type Frame
exception error android, renderer, type-mismatch, frame, fast-renderer, maui-compat
Element is not of type " + typeof(Image)
exception error android, renderer, type-mismatch, image, fast-renderer, maui-compat
Element must be of type Label
exception error android, renderer, type-mismatch, label, fast-renderer, maui-compat
ItemTemplate count has exceeded the limit of {ViewTypeCount}
exception error android, listview, datatemplate, memory, adapter, perf, maui-compat
View for cell must implement {nameof(INativeElementView)} to
exception error android, listview, recycle, viewcell, caching-strategy, maui-compat
element is not of type " + typeof(TElement)
exception error android, renderer, type-mismatch, generic, base-renderer, maui-compat
Unable to find Application Services
exception critical windows, maui-host, di, startup, maui-compat, platform
Unable to find Application Services
exception critical windows, maui-host, di, dispatcher, startup, maui-compat
MinimumDate must be lower than MaximumDate
exception error gtk, datepicker, validation, date-range, maui-compat
MaximumDate must be greater than MinimumDate
exception error gtk, datepicker, validation, date-range, maui-compat
OpenGL dll not found!
exception critical gtk, opengl, x11, native-library, linux, glwidget, maui-compat
Glx entry point not found!
exception critical gtk, opengl, x11, glx, native-library, linux, glwidget, maui-compat
call Forms.Init() before this
exception error gtk, startup, init-order, forms, maui-compat
call GtkThemes.Init() before this
exception error gtk, startup, init-order, theming, maui-compat
InsertPageBefore is not supported globally on GTK, please us
exception error gtk, navigation, navigationpage, not-supported, maui-compat
PopAsync is not supported globally on GTK, please use a Navi
exception error gtk, navigation, navigationpage, not-supported, maui-compat
PopToRootAsync is not supported globally on GTK, please use
exception error gtk, navigation, navigationpage, platform-limitation, maui, xamarin
PushAsync is not supported globally on GTK, please use a Nav
exception error gtk, navigation, navigationpage, platform-limitation, maui, xamarin
RemovePage is not supported globally on GTK, please use a Na
exception error gtk, navigation, navigationpage, platform-limitation, maui, xamarin
New element must be a CarouselPage
exception error gtk, renderer, carousel, type-mismatch, maui, xamarin
NavigationPage must have a root Page before being used. Eith
exception error gtk, navigationpage, renderer, lifecycle, maui, xamarin
This should never happen, please file a bug
exception error gtk, navigationpage, invariant, concurrency, renderer, maui
Popped page does not appear on top of current navigation sta
exception error gtk, navigationpage, concurrency, invariant, renderer, maui
Element must be a TabbedPage
exception error gtk, renderer, tabbedpage, type-mismatch, maui, xamarin
call Forms.Init() before this
exception error macos, initialization, forms, lifecycle, maui, xamarin
application
exception error macos, argument-null, lifecycle, forms, maui, xamarin
Please provide a main window in your app
exception critical macos, window, startup, storyboard, lifecycle, maui
You MUST invoke LoadApplication () before calling base.Finis
exception critical macos, startup, lifecycle, ordering, forms, maui
mainRenderer
exception error macos, argument-null, modal, internal, maui
No Modal pages found in the stack, make sure you pushed a mo
exception error macos, modal, navigation, validation, maui, xamarin
PopAsync is not supported globally on macOS, please use a Na
exception error macos, navigation, navigationpage, platform-limitation, maui, xamarin
PopToRootAsync is not supported globally on macOS, please us
exception error macos, navigation, navigationpage, platform-limitation, maui, xamarin
PushAsync is not supported globally on macOS, please use a N
exception error macos, navigation, navigationpage, platform-limitation, maui, xamarin
RemovePage is not supported globally on macOS, please use a
exception error macos, navigation, navigationpage, platform-limitation, maui, xamarin
InsertPageBefore is not supported globally on macOS, please
exception error macos, navigation, navigationpage, platform-limitation, maui, xamarin
NavigationPage must have a root Page before being used. Eith
exception error macos, navigationpage, renderer, lifecycle, maui, xamarin
newElement
exception error tizen, renderer, argumentnull, null-guard, lifecycle
Element is not of type {typeof(TElement)}
exception error tizen, renderer, type-mismatch, argument, registrar
ContentLoader
exception error wpf, dependency-property, argumentnull, content-loader, binding
ContentLoader
exception error wpf, dependency-property, argumentnull, content-loader, size-changed
Temporary removed exception message
exception error wpf, transitions, visual-state, argument, placeholder-message
'{0}' Transition could not be found!
exception error wpf, transitions, visual-state, storyboard, argument
Call Forms.Init() before this
exception error wpf, initialization, startup-order, page-extensions
Could not find or create a renderer for {view}
exception error wpf, renderer, registrar, missing-registration, startup
UIThreadRequired
exception error wpf, threading, dispatcher, content-loader, ui-thread
UIThreadRequired
exception error wpf, threading, dispatcher, content-loader, ui-thread
InsertPageBefore is not supported globally on Windows, pleas
exception error wpf, navigation, not-supported, light-navigation-page
Pop is not supported globally on Windows, please use a Light
exception error wpf, navigation, not-supported, light-navigation-page
PopToRoot is not supported globally on Windows, please use a
exception error wpf, navigation, not-supported, light-navigation-page
Push is not supported globally on Windows, please use a Ligh
exception error wpf, navigation, not-supported, light-navigation-page
RemovePage is not supported globally on Windows, please use
exception error wpf, navigation, not-supported, light-navigation-page
StackDepth is not supported globally on Windows, please use
exception error wpf, navigation, not-supported, light-navigation-page, property
Unable to create a device context from the specified device
exception critical wpf, gdi, native-interop, device-context, systemexception
Unable to initialize GDI+
exception critical wpf, gdi, gdiplus, native-interop, startup
IConnectionPoint::Advise returned an invalid cookie.
exception error wpf, com, interop, connection-point, events
The stream doesn't support modifications.
exception error stream, io, read-only, notsupported
Bad value for origin
exception error stream, enum, validation, interop
The streams can't be read for comparison
exception error stream, io, validation, comparison
Invalid enumeration value
validation error enum, validation, io, file-copy
The parameter cannot be either null or empty.
validation error validation, argument, null-check, verify
The parameter cannot be either null or empty or consist only
validation error validation, argument, null-check, whitespace, verify
The parameter must not be the default value.
validation error validation, argument, value-type, default, verify
The parameter must be null.
validation error validation, argument, lifecycle, verify
The property {0} cannot be null at this time.
exception error validation, invalid-operation, state, property, verify
The property {0} must be null at this time.
exception error validation, invalid-operation, state, lifecycle, verify
The URI must be absolute.
validation error validation, argument, uri, relative-uri, verify
The integer value must be bounded with [{0}, {1})
validation error validation, argument, range, integer, verify
The type of this parameter does not support a required inter
validation error validation, reflection, interface, type, verify
No file exists at "{0}"
validation error validation, io, file-exists, argument, verify
The parameter must implement interface {0}.
validation error validation, reflection, interface, argument, verify
The element must be a DependencyObject
validation error wpf, dependency-object, argument, window-chrome, attached-property
Unable to combine two HRGNs.
exception error wpf, windowchrome, gdi, hrgn, win32, native-interop
NavigationStack is not supported globally on Windows, please
exception error wpf, maui-compatibility, navigation, navigationpage, platform
PushAsync is not supported globally on Windows, please use a
exception error wpf, maui-compatibility, navigation, navigationpage, platform
PopAsync is not supported globally on Windows, please use a
exception error wpf, maui-compatibility, navigation, navigationpage, platform
PopToRootAsync is not supported globally on Windows, please
exception error wpf, maui-compatibility, navigation, navigationpage, platform
RemovePage is not supported globally on Windows, please use
exception error wpf, maui-compatibility, navigation, navigationpage, platform
InsertPageBefore is not supported globally on Windows, pleas
exception error wpf, maui-compatibility, navigation, navigationpage, platform
Unhandled expression type: '{0}'
exception error wpf, expressions, linq, expression-tree, visitor-pattern
Unhandled binding type '{0}'
exception error wpf, expressions, linq, expression-tree, member-binding
Can't set CarouselView to position {carouselPosition}. Items
exception error wpf, maui-compatibility, carouselview, collectionview, index-validation
Visible item not found
exception error wpf, maui-compatibility, carouselview, collectionview, virtualization
The layout is not implemented
exception error wpf, maui-compatibility, collectionview, itemslayout, renderer
type is not a Foregroundable type
exception error wpf, maui-compatibility, foreground, dependencyproperty, reflection
Element must be a Page
exception error wpf, maui-compatibility, navigationpage, renderer, type-validation
NavigationPage must have a root Page before being used. Eith
exception error wpf, maui-compatibility, navigationpage, renderer, state-validation
Cannot navigate to FormsEmbeddedPageWrapper without providin
exception error wpf, maui-compatibility, embedded, navigation, page-extensions
Could not find or create a renderer for the Page {page}
exception error wpf, maui-compatibility, embedded, renderer-registration, page-extensions
call Forms.Init() before this
exception error wpf, maui-compatibility, forms-init, bootstrap, page-extensions
Could not find or create a renderer for {visualElement}
exception error rendering, renderer-registration, winui, uwp, maui-compatibility
PushAsync is not supported globally on Windows, please use a
exception error navigation, winui, uwp, maui-compatibility, platform-limitation
PopAsync is not supported globally on Windows, please use a
exception error navigation, winui, uwp, maui-compatibility, platform-limitation
PopToRootAsync is not supported globally on Windows, please
exception error navigation, winui, uwp, maui-compatibility, platform-limitation
RemovePage is not supported globally on Windows, please use
exception error navigation, winui, uwp, maui-compatibility, platform-limitation
InsertPageBefore is not supported globally on Windows, pleas
exception error navigation, winui, uwp, maui-compatibility, platform-limitation
page
exception error navigation, null-argument, validation, winui, uwp
Changing the current page is only allowed if it's being call
exception error threading, ui-thread, concurrency, winui, uwp, maui-compatibility
Element must be a TabbedPage
exception error rendering, type-mismatch, validation, winui, tabbedpage
self
exception error null-argument, extensions, validation, winui, rendering
renderer
exception error null-argument, validation, rendering, winui, layout
Renderer's container element must be a Panel
exception error rendering, type-mismatch, layout, winui, panel
Cannot assign a native control without an Element; Renderer
exception error rendering, lifecycle, disposal, winui, race-condition
Unhandled expression type: '{0}'
exception error expression-trees, data-binding, winui, internal
Unhandled binding type '{0}'
exception error expression-trees, data-binding, winui, internal
ViewCell must have a View
exception error rendering, cells, ios, validation, viewcell
Loop Manager expects a UICollectionViewFlowLayout
exception error carousel, collectionview, ios, null-argument, layout
IItemsViewSource is empty
exception error collectionview, carousel, ios, empty-state, sentinel
indexPath
exception error maui, xamarin-forms, ios, uicollectionview, argument-validation, indexpath
group
exception error maui, xamarin-forms, ios, uicollectionview, argument-validation, grouping
indexPath
exception error maui, xamarin-forms, ios, uicollectionview, observablecollection, argument-validation
view
exception error maui, xamarin-forms, ios, datatemplate, argument-validation, renderer
Implement INativeElementView on cell renderer: {ContentCell.
exception error maui, xamarin-forms, ios, cell-renderer, context-actions, invalidoperation
No UIViewController found to present.
exception error maui, xamarin-forms, ios, context-actions, uiviewcontroller, invalidoperation
renderer
exception error maui, xamarin-forms, ios, event-tracker, gesture, argument-validation
self
exception error maui, xamarin-forms, ios, visualelement, renderer, argument-validation
You MUST invoke LoadApplication () before calling base.Finis
exception critical maui, xamarin-forms, ios, appdelegate, lifecycle, startup, invalidoperation
application
exception critical maui, xamarin-forms, ios, appdelegate, argument-validation, startup
call Forms.Init() before this
exception critical maui, xamarin-forms, ios, initialization, startup, invalidoperation
InsertPageBefore is not supported globally on iOS, please us
exception error maui, xamarin-forms, ios, navigation, navigationpage, invalidoperation
PopAsync is not supported globally on iOS, please use a Navi
exception error maui, xamarin-forms, ios, navigation, navigationpage, invalidoperation
PopToRootAsync is not supported globally on iOS, please use
exception error maui, xamarin-forms, ios, navigation, navigationpage, invalidoperation
PushAsync is not supported globally on iOS, please use a Nav
exception error maui, xamarin-forms, ios, navigation, navigationpage, invalidoperation
RemovePage is not supported globally on iOS, please use a Na
exception error maui, xamarin-forms, ios, navigation, navigationpage, invalidoperation
Invalid Uri
exception error maui, xamarin-forms, ios, uri, files, image-source, argument
uri
exception error maui, xamarin-forms, ios, uri, files, argument
renderer
exception error maui, xamarin-forms, ios, renderer, rendererpool, argument-validation
oldElement
exception error argumentnullexception, ios, renderer-pool, compatibility, obsolete
view
exception error argumentnullexception, ios, renderer-pool, lifecycle
newElement
exception error argumentnullexception, ios, renderer-pool, element-changed
renderer
exception error argumentnullexception, ios, button-layout, renderer-wiring
ImageElementManager.SetImage renderer cannot be null
exception error argumentnullexception, ios, image, async, renderer-disposal
renderer
exception error argumentnullexception, ios, image, extension-method, renderer-lookup
imageSourceProperty
exception error argumentnullexception, ios, image, bindableproperty, static-init
bindable
exception error argumentnullexception, ios, image, async, lifecycle
Index '{Math.Max(e.NewStartingIndex, e.OldStartingIndex)}' i
exception error argumentexception, ios, listview, collection-changed, threading, retain-element
Header cells do not support context actions
exception error notsupportedexception, ios, listview, grouping, context-actions
NavigationPage must have a root Page before being used. Eith
exception critical invalidoperationexception, ios, navigationpage, viewdidload, root-page
Popped page does not appear on top of current navigation sta
exception critical notsupportedexception, ios, navigation, stack-corruption, race
ParentingViewController parent could not be found. Please fi
exception critical notsupportedexception, ios, navigation, parentingviewcontroller, internal-bug
before
exception error argumentnullexception, ios, navigation, insertpagebefore
page
exception error argumentnullexception, ios, navigation, insertpagebefore
renderer must be a Page renderer.
exception error invalidcastexception, ios, tabbedpage, children, type-mismatch
renderer
exception error argumentnullexception, ios, webview, wkwebview, delegate-wiring
renderer
exception error argumentnullexception, ios, packager, layout-renderer, renderer-wiring
renderer
exception error maui, ios, renderer, argument-null, visual-element-tracker
AppLinkUri
exception error maui, ios, applinks, core-spotlight, argument-null
uri
exception error maui, ios, applinks, core-spotlight, argument-null
AppLinkEntry Thumbnail must be set to a valid source
exception error maui, ios, applinks, core-spotlight, image-source, thumbnail
{element?.GetType().FullName} is not compatible. element mus
exception error maui, android, material, renderer, type-mismatch, activity-indicator
Element must be of type Button.
exception error maui, android, material, renderer, type-mismatch, button
Element must be of type Frame.
exception error maui, android, material, renderer, type-mismatch, frame
Element must be of type ProgressBar.
exception error maui, android, material, renderer, type-mismatch, progress-bar
Element must be of type Slider.
exception error maui, android, material, renderer, type-mismatch, slider
Element must be of type Frame.
exception error maui, ios, material, renderer, type-mismatch, frame
Pin must have a Label to be added to a map
exception error maui, maps, pin, argument, validation, collection-changed
The Map.ItemTemplate property only supports DataTemplate. Se
exception error maui, maps, datatemplate, datatemplateselector, not-supported, itemtemplate
Unable to get window from parent view controller
exception error maui, maccatalyst, embedding, uikit, uiwindow, lifecycle
Unable to load system image 'macwindow.badge.plus'
exception error maui, maccatalyst, uikit, sf-symbols, system-image, asset
Unable to get window from parent view controller
exception error maui, ios, embedding, uikit, uiwindow, lifecycle
Unable to load system image 'macwindow.badge.plus'
exception error maui, ios, uikit, sf-symbols, system-image, asset, platform-specific
EnumPicker: EnumType property must be enumeration type
exception error maui, controls, picker, enum, argument, validation, sample
EnumPicker: EnumType property must be enumeration type
exception error maui, controls, picker, enum, argument, validation, sample, collectionview
This is a test exception thrown from C# code!
exception error maui, hybridwebview, sample, demo, javascript-interop, intentional
This is an async test exception thrown from C# code!
exception info hybridwebview, sample, async, exception-handling, csharp
HTTP error: ${response.status}
exception error hybridwebview, javascript, http, fetch, assets, sample
This is a test error thrown from JavaScript code!
exception info hybridwebview, javascript, sample, exception-handling
This is an async test error thrown from JavaScript code!
exception info hybridwebview, javascript, async, sample, exception-handling
Unsupported path part type: {nextPart.GetType()}
exception error source-generator, bindings, compilation, internal, csharp
Member '{member.MemberName}' with inaccessible accessor must
exception error source-generator, bindings, unsafe-accessors, internal, csharp
XC0020
The name of the BindableProperty {0} does not end with "Property".
exception error xaml, xamlc, bindableproperty, compilation
XC0040
Cannot convert value "{0}" to "{1}".
exception error xaml, xamlc, bindableproperty, compilation
XC0000
Cannot resolve type "{0}".
exception error xaml, xamlc, type-resolution, compilation
XC0001
Cannot resolve property "{0}" on type "{1} (property missing or missing accessor
exception error xaml, xamlc, property-resolution, bindableproperty, compilation
Expected VisualStateGroup but found {parent.Parent}
exception error xaml, xamlc, visualstate, compilation
XC0040
Cannot convert value "{0}" to "{1}".
exception error xaml, xamlc, layout, absolutelayout, compilation
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, xamlc, brush, compilation
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, xamlc, color, compilation
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, xamlc, grid, compilation
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, xamlc, relativelayout, constraint, compilation
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, cornerradius, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, easing, animation, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, enum, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, flexlayout, flexbasis, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, fontsize, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, gridlength, grid, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, imagesource, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, layoutoptions, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, point, graphics, build-time
XC0124
Resource "{0}" not found.
error_code error xaml, maui, xamlc, resourcedictionary, resource-missing, assembly-reference, build-time
XC0004
Missing default constructor for "{0}".
error_code error xaml, maui, xamlc, resourcedictionary, constructor, build-time
XC0040
Cannot convert value "{0}" to "{1}".
error_code error xaml, maui, xamlc, type-converter, rect, rectangle, build-time
XC0040
Cannot convert value "{0}" to "{1}".
exception error xaml, maui, xamlc, type-converter, rowdefinition, grid, build-time
XC0040
Cannot convert value "{0}" to "{1}".
exception error xaml, maui, xamlc, type-converter, shape, strokeshape, border, build-time
XC0040
Cannot convert value "{0}" to "{1}".
exception error xaml, maui, xamlc, type-converter, thickness, margin, padding, build-time
XC0040
Cannot convert value "{0}" to "{1}".
exception error xaml, maui, xamlc, type-converter, type-resolution, xmlns, build-time
XC0003
Missing mandatory property "{0}" on "{1}".
exception error xaml, maui, xamlc, markup-extension, datatemplate, property-missing, build-time
XC0000
Cannot resolve type "{0}".
exception error xaml, maui, xamlc, markup-extension, datatemplate, type-resolution, build-time
XC0100
Syntax for x:Static is "[Member=][prefix:]typeName.staticMemberName".
exception error xaml, xamlc, x-static, markup-extension, build-time
XC0101
x:Static: unable to find a public -- or accessible internal -- static field, sta
exception error xaml, xamlc, x-static, member-resolution, api-versioning, build-time
XC0128
A key is required in {StaticResource}.
exception error xaml, xamlc, staticresource, resource-dictionary, markup-extension, build-time
XC0003
Missing mandatory property "{0}" on "{1}".
exception error xaml, xamlc, x-type, type-resolution, markup-extension, build-time
XC0000
Cannot resolve type "{0}".
exception error xaml, xamlc, x-type, type-resolution, references, build-time
XC0120
StyleSheet cannot have both a Source and a content.
exception error xaml, xamlc, stylesheet, css, build-time
XC0121
StyleSheet require either a Source or a content.
exception error xaml, xamlc, stylesheet, css, build-time
XC0122
Style property or Content is not a string literal.
exception error xaml, xamlc, stylesheet, css, markup-extension, build-time
XC0123
Source property is not a string literal.
exception error xaml, xamlc, stylesheet, css, resource-path, build-time
Resource '{source}' not found.
exception error xaml, xamlc, stylesheet, embedded-resource, resource-path, build-time
XC0005
Missing constructor for "{0}" with matching x:Arguments.
exception error xaml, xamlc, x-arguments, constructor, object-construction, build-time
XC0006
No static method found for "{0}::{1} ({2})".
exception error xaml, xamlc, x-factorymethod, static-method, object-construction, build-time
XC0003
Missing mandatory property "{0}" on "{1}".
exception error xaml, xamlc, constructor, parameter-attribute, object-construction, build-time
XC0004
Missing default constructor for "{0}".
exception error xaml, xamlc, constructor, default-constructor, object-construction, typeconverter, build-time
XC0060
Markup expression not closed.
exception error xaml, xamlc, markup-extension, syntax, build-time
XC0061
Error while parsing markup expression.
exception error xaml, xamlc, markup-extension, syntax, escaping, build-time
XC0062
Undeclared xmlns prefix "{0}".
exception error xaml, xamlc, xmlns, namespace, markup-extension, build-time
XC0040
Cannot convert value "{0}" to "{1}".
exception error xaml, xamlc, typeconverter, value-conversion, parsing, build-time
XC0063
Multi-valued enums are not valid on sbyte enum types.
exception error xaml, xamlc, enum, flags, sbyte
XC0007
Enum value not found for "{0}".
exception error xaml, xamlc, enum
XC0064
An element with the name "{0}" already exists in this NameScope.
exception error xaml, xamlc, namescope, x-name
XC0065
Cannot set the content of "{0}" as it doesn't have a [ContentProperty] attribute
exception error xaml, xamlc, content-property, custom-control
XC0008
No Add() method defined on "{0}{1}".
exception error xaml, xamlc, collection, add-method
XC0102
x:DataType expects a string literal, an {{x:Type}} markup or {{x:Null}}.
exception error xaml, xamlc, compiled-bindings, x-datatype
XC0062
Undeclared xmlns prefix "{0}".
exception error xaml, xamlc, xmlns, x-datatype
XC0041
Binding: Indexer did not contain closing bracket.
exception error xaml, xamlc, compiled-bindings, indexer, binding-path
XC0042
Binding: Indexer did not contain arguments.
exception error xaml, xamlc, compiled-bindings, indexer, binding-path
XC0043
Binding: Unsupported indexer index type: "{0}".
exception error xaml, xamlc, compiled-bindings, indexer, binding-path
XC0044
Binding: "{0}" cannot be parsed as an index for a "{1}".
exception error xaml, xamlc, compiled-bindings, indexer, enum
XC0009
No property, BindableProperty, or event found for "{0}", or mismatching type bet
exception error xaml, xamlc, property-resolution, bindableproperty, event
XC0001
Cannot resolve property "{0}" on type "{1} (property missing or missing accessor
exception error xaml, xamlc, property-resolution, binding
XC0002
EventHandler "{0}" with correct signature not found in type "{1}".
exception error xaml, xamlc, event-handler, code-behind
XC0127
x:Key expects a string literal.
exception error xaml, xamlc, resource-dictionary, x-key
XC0125
"A resource with the key "{0}" is already present in the ResourceDictionary.
exception error xaml, resource-dictionary, build-task, duplicate-key, xc0125
XC0126
Resources in ResourceDictionary require a x:Key attribute.
exception error xaml, resource-dictionary, build-task, missing-key, xc0126
XC0066
Invalid Xaml "Protected Xmlns {xmlNamespace}. Can't add assembly {assemblyName}.
exception error xaml, xmlns, build-task, protected-namespace, xc0066
XC0000
Cannot resolve type "{0}".
exception error xaml, type-resolution, build-task, missing-assembly, xc0000
No IAppIndexingProvider was provided
exception error application, app-links, configuration, null-provider
No AppLinks implementation was found, if in Android make sur
exception error application, app-links, android, missing-package
Setting a Parent on Application is invalid.
exception error application, parenting, invalid-operation, logical-tree
Both MainPage was set and CreateWindow was overridden to pro
exception error application, window, startup, multi-window
finishAt must be greater than beginAt
validation error animation, argument-validation, timing
Either set {nameof(MainPage)} or override {nameof(Applicatio
exception critical application, window, startup, not-implemented
You are using an instance of {nameof(DataTemplateSelector)}
exception error bindable-layout, datatemplate, datatemplateselector, not-supported
property
exception error bindable-object, null-argument, clearvalue
propertyKey
exception error bindable-object, null-argument, clearvalue, readonly-key
targetProperty
exception error bindable-object, null-argument, isset
binding
exception error maui, binding, argument-null, nullable
key
exception error maui, dynamic-resource, argument-null, resource-key
The BindableProperty "{property.PropertyName}" is readonly.
exception error maui, coerce, readonly, invalidoperation, bindableproperty
Value is an invalid value for {property.PropertyName}
exception error maui, coerce, validation, argument, bindableproperty
self
exception error maui, binding, argument-null, extension-method, nullable
targetProperty
exception error maui, binding, argument-null, bindableproperty, extension-method
Call to SetBinding<{typeof(TSource)}, {typeof(TProperty)}> c
exception error maui, data-binding, source-generators, msbuild, feature-switch
Call to SetBinding<{typeof(TSource)}, {typeof(TProperty)}> w
exception error maui, data-binding, source-generators, lambda, interceptor
propertyName
exception error maui, bindableproperty, argument-validation, nullable
returnType
exception error maui, bindableproperty, argument-validation, nullable
declaringType
exception error maui, bindableproperty, argument-validation, attached-property, nullable
Not a valid type of BindingMode. Property: {returnType} {dec
exception error maui, bindableproperty, argument-validation, enum, binding-mode
Default value did not match return type. Property: {returnTy
exception error maui, bindableproperty, argument-validation, type-mismatch, default-value
Can't resolve {0}
exception error maui, xaml, bindableproperty, converter, setter
Can't resolve {parts[0]}
exception error maui, xaml, bindableproperty, converter, type-resolution
Can't resolve {value}. Syntax is [[prefix:]Type.]PropertyNam
exception error maui, xaml, bindableproperty, converter, syntax
Can't resolve {name} on {type.Name}
exception error maui, xaml, bindableproperty, converter, type-resolution
The PropertyName of {type.Name}.{name} is not {propertyName}
exception error maui, xaml, bindableproperty, converter, rename, obsolete
Expected {nameof(VisualStateGroup)} but found {parents[2]}.
exception error maui, xaml, visualstate, converter, markup-structure
Expected {nameof(VisualStateGroupList)} but found {parents[3
exception error maui, xaml, visualstate, converter, markup-structure
Expected {nameof(Setter)} but found {parents[4]}.
exception error maui, xaml, visualstate, converter, setter, markup-structure
Unable to find a TragetType for the Bindable Property. Try p
exception error maui, xaml, visualstate, converter, style, targettype
path cannot be an empty string
exception error maui, data-binding, argument-validation, nullable
Cannot apply relative binding to {bindObj.GetType().FullName
exception error maui, data-binding, relative-binding, element-tree, invalidoperation
Cannot apply relative binding when the target object is null
exception error maui, data-binding, relative-binding, nullable, lifecycle
Call to Create<{typeof(TSource)}, {typeof(TProperty)}> could
exception error maui, binding, source-generator, interceptor, configuration
Call to Create<{typeof(TSource)}, {typeof(TProperty)}>() was
exception error maui, binding, source-generator, interceptor, configuration
mode is not a valid BindingMode
exception error maui, binding, validation, enum
Cannot change a binding while it's applied
exception error maui, binding, state, immutability
Binding instances cannot be reused
exception error maui, binding, reuse, single-use
Path contains an empty part
exception error maui, binding, path, validation, format
Indexer did not contain closing bracket
exception error maui, binding, path, indexer, validation
Indexer did not contain arguments
exception error maui, binding, path, indexer, validation
Cannot convert null into {typeof(ButtonContentLayout)}
exception error maui, button, type-converter, xaml, null
Cannot convert "{strValue}" into {typeof(ButtonContentLayout
exception error maui, button, type-converter, xaml, format
Cannot convert "{0}" into {1}
exception error maui, grid, type-converter, xaml, null
ItemTemplate count has exceeded the limit of {ViewTypeCount}
exception error maui, listview, android, datatemplate, performance, memory
View for cell must implement INativeElementView to enable re
exception error maui, listview, android, recycling, custom-renderer, inativeelementview
ViewCell must have a View
exception error maui, listview, android, viewcell, null
Implement INativeElementView on cell renderer: {ContentCell.
exception error maui, listview, ios, context-actions, custom-renderer, inativeelementview
No UIViewController found to present.
exception error maui, listview, ios, context-actions, uiviewcontroller, lifecycle
Index '{Math.Max(e.NewStartingIndex, e.OldStartingIndex)}' i
exception error maui, listview, ios, observablecollection, threading, index
Header cells do not support context actions
exception error maui, listview, ios, grouping, context-actions, header
ViewCell must have a View
exception error maui, listview, ios, viewcell, null
NavigationPage must have a root Page before being used. Eith
exception error maui, ios, navigation, navigationpage, renderer
Popped page does not appear on top of current navigation sta
exception error maui, ios, navigation, navigationpage, concurrency, renderer
ParentingViewController parent could not be found. Please fi
exception error maui, ios, navigation, navigationpage, concurrency, renderer
Active Shell Item not set. Have you added any Shell Items to
exception error maui, android, shell, renderer, fragment
Content not found for active {ShellItem}. Title: {ShellItem.
exception error maui, android, shell, renderer, fragment
Unexpected navigation type
exception error maui, android, shell, navigation, renderer
LoadView must be called before accessing View
exception error maui, android, shell, search, renderer, lifecycle
DisplayMemberName is not supported. Consider implementing cu
exception error maui, android, shell, search, trimming, nativeaot, csproj
Shell Content Page is Null
exception error maui, android, shell, datatemplate, di, renderer
Content not found for active {shellSection}. Title: {shellSe
exception error maui, android, shell, renderer, fragment
Content not found for active {ShellItem}. Title: {ShellItem.
exception error maui, ios, shell, renderer, uiviewcontroller
Reuse of the Shell Renderer is not supported
exception error maui, ios, shell, renderer, lifecycle
Active Shell Item not set. Have you added any Shell Items to
exception error maui, ios, shell, renderer
Content not found for active {Shell.CurrentItem}. Title: {Sh
exception error maui, ios, shell, renderer
DisplayMemberName is not supported. Consider implementing cu
exception error maui, ios, shell, search, trimming, nativeaot, csproj
Content not found for active {ShellSection}. Title: {ShellSe
exception error maui, ios, shell, renderer, uiviewcontroller
renderer must be a Page renderer.
exception error maui, ios, tabbedpage, renderer, type-mismatch
MauiContext not set
exception error maui, renderer, mauicontext, lifecycle, initialization
Unknown cell parent type
exception error maui, ios, cell, listview, tableview, compatibility
IsHeadless cannot be modified when the view is rendered
exception warning maui, layout, obsolete, lifecycle, compressed-layout
Binding and Value found for {PropertyName}
exception error datatemplate, binding, xaml, invalidoperation
DataTemplateSelector.OnSelectTemplate must not return anothe
exception error datatemplateselector, datatemplate, listview, notsupported
RecycleElementAndDataTemplate requires DataTemplate activate
exception error listview, datatemplate, caching, recycle, notsupported
Cannot convert "{value}" into {typeof(DateTime)}
exception error typeconverter, datetime, dateonly, xaml, parsing
Cannot convert "{value}" into {destinationType}
exception error typeconverter, datetime, convertto, parsing
Cannot convert "{dateOnly}" into {destinationType}
exception error typeconverter, dateonly, convertto, destinationtype
Cannot convert "{dateTime}" into {destinationType}
exception error typeconverter, datetime, convertto, destinationtype
Cannot convert "{0}" into {1}
exception error typeconverter, textdecorations, convertfrom, invalidoperation
Resolved instance is not of the correct type.
exception error dependencyresolver, di, invalidcast, type-mismatch
The current platform does not implement the IFontNamedSizeSe
exception error device, dependencyservice, font, platform, notimplemented, obsolete
BindableObject was not instantiated on a thread with a dispa
exception error dispatcher, threading, invalidoperation, uithread
The dispatcher was not found and the current application doe
exception error dispatcher, threading, invalidoperation, uithread
Cannot convert "{0}" into {1}
exception error typeconverter, doublecollection, convertfrom, invalidoperation
_ = args ?? throw new ArgumentNullException(nameof(args));
exception error draganddrop, argumentnull, gesturerecognizer, internal
_ = view ?? throw new ArgumentNullException(nameof(view));
exception error draganddrop, argumentnull, eventargs, constructor
Cannot convert {self} to {nameof(EffectiveFlowDirection)}.
exception error flowdirection, enum, invalidoperation, rtl
Cannot convert {self} to {nameof(FlowDirection)}.
exception info flowdirection, deadcode, unreachable, rtl
{nameof(AutomationId)} may only be set one time.
exception error element, automationid, immutable, invalidoperation, testing
Namescopes are not supported. Please enable the feature swit
exception error maui, namescope, feature-switch, xaml, trimming
this element is not in a namescope
exception error maui, namescope, element-tree, findbyname, invalidoperation
Cannot attach Effect to multiple sources
exception error maui, effects, invalidoperation, sharing, instance-reuse
throw new ArgumentOutOfRangeException();
exception error maui, effects, collectionchanged, argumentoutofrange, defensive
Handler is already being set elsewhere
exception error maui, handler, reentrancy, invalidoperation, lifecycle
Element IList<Element>.this[int index] { get => _inner[index
exception warning maui, readonly-collection, logicalchildren, notsupported, hot-reload
void ICollection<Element>.Add(Element item) => throw new Not
exception warning maui, readonly-collection, logicalchildren, notsupported
void ICollection<Element>.Clear() => throw new NotSupportedE
exception warning maui, readonly-collection, logicalchildren, notsupported
void ICollection<Element>.CopyTo(Element[] array, int arrayI
exception warning maui, readonly-collection, logicalchildren, notsupported, copyto
void IList<Element>.Insert(int index, Element item) => throw
exception warning maui, readonly-collection, logicalchildren, notsupported
bool ICollection<Element>.Remove(Element item) => throw new
exception warning maui, readonly-collection, logicalchildren, notsupported
void IList<Element>.RemoveAt(int index) => throw new NotSupp
exception warning maui, readonly-collection, logicalchildren, notsupported
public ElementEventArgs(Element element) => Element = elemen
exception error maui, argumentnull, eventargs, element-lifecycle
throw new ArgumentNullException(nameof(type));
exception error maui, argumentnull, datatemplate, controltemplate, reflection
internal ElementTemplate(Func<object> loadTemplate) : this()
exception error maui, argumentnull, datatemplate, controltemplate, factory
Cannot call CreateContent directly on a DataTemplateSelector
exception error maui, datatemplate, xaml, controls
uniqueName must not contain a .
exception error maui, effects, attributes, configuration
Cannot convert "{0}" into {1}
exception error maui, typeconverter, imagesource, xaml
throw new NotSupportedException();
exception error maui, typeconverter, imagesource, diagnostics
Cannot convert "{strValue}" into {typeof(FlowDirection)}
exception error maui, typeconverter, flowdirection, xaml
throw new NotSupportedException();
exception error maui, typeconverter, flowdirection, diagnostics
Detail cannot be set to null once a value is set.
exception error maui, flyoutpage, navigation, state
Detail must not already have a parent.
exception error maui, flyoutpage, element-tree, navigation
Flyout cannot be set to null once a value is set
exception error maui, flyoutpage, navigation, state
Title property must be set on Flyout page
exception error maui, flyoutpage, navigation, validation
Flyout must not already have a parent.
exception error maui, flyoutpage, element-tree, navigation
Detail must be set before using a FlyoutPage
exception error maui, flyoutpage, renderers, layout
Flyout must be set before using a FlyoutPage
exception error maui, flyoutpage, renderers, layout
Invalid Debian version format: {version}
exception error python, cross-build, rootfs, debian
Could not find 'data.tar.*' in {deb_file}.
exception error python, cross-build, rootfs, packaging
Unsupported compression format: {file_extension}
exception error python, cross-build, rootfs, compression
Unsupported distro
exception error python, cross-build, rootfs, configuration