ErrLookup › AvaloniaUI/Avalonia
AvaloniaUI/Avalonia
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI · C# · 3,343 source files
Analyzed at 11c5427268 on 2026-08-13. 378 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Unable to access .NET memory | exception | error | browser, rendering, wasm, interop, typescript, dotnet-memory |
| Module.GL object wasn't initialized, WebGL can't be used. | exception | critical | browser, rendering, webgl, wasm, emscripten, typescript |
| HTMLCanvasElement.getContext returned null. | exception | error | browser, rendering, webgl, canvas, typescript, fallback |
| Unable to access emscripten PThread api | exception | error | browser, rendering, emscripten, pthread, worker, wasm, typescript |
| Unable get pthread with id ${pthreadId} | exception | error | browser, rendering, emscripten, pthread, worker, typescript |
| Unable get Worker for pthread ${pthreadId} | exception | error | browser, rendering, emscripten, pthread, worker, typescript |
| StorageItem is not a file | exception | error | browser, storage, file-system-access, typescript, validation |
| StorageItem is not a writeable file | exception | error | browser, storage, file-system-access, typescript, validation, write |
| Unable to create item in the requested directory | exception | error | browser, storage, file-system-access, typescript, validation, create |
| Unable to move item to the requested directory | exception | error | browser, storage, file-system-access, typescript, validation, move |
| Permissions denied | exception | error | browser, storage, file-system-access, permissions, typescript |
| Value must be less than 10. | exception | warning | sample, binding, validation, csharp, reactiveui, argumentoutofrange |
| Transition elements have different parents. | exception | error | sample, transition, animation, visual-tree, csharp, argument |
| Give me 5 or more letter please :-) | validation | warning | sample, binding, validation, csharp, argumentoutofrange |
| Controls for PageSlide must have same parent. | exception | error | sample, transition, visual-tree, csharp, argument |
| Cannot determine visual parent. | exception | error | sample, transition, visual-tree, csharp, invalidoperation |
| Device with the corresponding LUID not found | exception | error | sample, gpu, vulkan, direct3d, interop, multi-gpu, csharp, argument |
| Not supported format | exception | error | sample, gpu, vulkan, direct3d, interop, format, csharp, argument |
| Vulkan D3DDevice wasn't created | exception | error | vulkan, d3d11, windows, external-memory, interop, sample |
| Unable to export IOSurfaceRef | exception | error | vulkan, macos, metal, iosurface, external-memory, sample |
| IOSurfaceLock failed | exception | error | macos, iosurface, texture, dump, sample |
| Need skia to dump textures, sorry | exception | error | skia, vulkan, texture, dump, macos, sample |
| Unable to export IOSurfaceRef | exception | error | vulkan, macos, metal, semaphore, external-semaphore, sample, message-bug |
| Could not get platform handle | exception | error | macos, embedding, native-control-host, nsview, integration-test |
| musl doesn't support RTLD_DEEPBIND | exception | error | linux, musl, alpine, harfbuzz, dlopen, native-libs, sample |
| Unable to load {libraryPath} via dlopen | exception | error | linux, dlopen, harfbuzz, native-libs, rid, sample, message-bug |
| Application.Context.MainLooper was not expected to be null. | exception | critical | android, dispatcher, looper, ui-thread, platform |
| This class should be instanciated from the UI thread | exception | critical | android, dispatcher, ui-thread, looper, platform, message-typo |
| AndroidPlatformOptions.RenderingMode must not be empty or nu | exception | error | android, platform-options, rendering, config, egl, vulkan, software |
| AndroidPlatformOptions.RenderingMode has a value of "{opts.R | exception | error | android, rendering, egl, vulkan, gpu-driver, emulator, fallback |
| Peer instance does not implement {T}. | exception | error | android, accessibility, automation-peer, a11y, generic-type, message-bug |
| Avalonia Application was not initialized. Make sure you have | exception | critical | android, application-lifecycle, appbuilder, activity, platform |
| Unknown error: AvaloniaView initialization has failed. | exception | critical | android, application-lifecycle, iandroidapplication, activity, platform |
| Activity.Window must be set. | exception | error | android, activity-lifecycle, window, insets, edge-to-edge, platform |
| The control isn't currently attached to a toplevel | exception | error | android, native-control-host, toplevel, lifecycle, layout, platform |
| Context.InputMethodService is expected to be not null. | exception | error | android, ime, input-method, context, text-input, platform |
| Main activity must implement IActivityResultHandler interfac | exception | error | android, permissions, activity-result, iactivityresulthandler, platform |
| Unable to obtain ANativeWindow | exception | critical | android, rendering, surface, lifecycle, skia |
| TopLevel.InternalView was not expected to be null. | exception | error | android, rendering, lifecycle, disposal, framebuffer |
| SurfaceView.Holder was not expected to be null during Invali | exception | critical | android, surface, construction, context, lifecycle |
| AvaloniaView.Context must not be null | exception | critical | android, context, construction, toplevel |
| Android backend wasn't initialized. Make sure .UseAndroid() | exception | critical | android, initialization, appbuilder, compositor, startup |
| Can not create '{name}' because a directory with the same na | exception | error | android, storage, io, name-conflict, saf |
| Can not create '{name}' because a file with the same name al | exception | error | android, storage, io, name-conflict, saf |
| Failed to open content stream | exception | error | android, storage, io, contentresolver, saf, read |
| File path is expected to be an absolute link with "file" or | exception | error | android, storage, uri, validation, scheme |
| Folder path is expected to be an absolute link with "file" o | exception | error | android, storage, uri, validation, scheme |
| Main activity must implement IActivityResultHandler interfac | exception | critical | android, activity, storage, picker, startup |
| result.GetStringExtra("error") | exception | error | android, storage, picker, saf, error-propagation |
| Surface handle can't be 0x0 | exception | critical | android, vulkan, surface, rendering, lifecycle |
| Transitions collection cannot be reset. | exception | error | animation, transitions, collection, binding, avalonia-base |
| No Setter property assigned. | exception | error | animation, xaml, setter, keyframe, validation |
| No animator registered for the property {setter.Property}. A | exception | error | animation, animator, registry, custom-property, avalonia-base |
| Unknown PlaybackBehavior value: {_playbackBehavior} | exception | error | animation, enum, playback, validation, version-mismatch |
| SpeedRatio value cannot be negative. | exception | error | animation, speedratio, validation, timing |
| Delay value cannot be negative. | exception | error | animation, delay, validation, timing |
| Duration value cannot be negative. | exception | error | animation, validation, timespan, avalonia |
| DelayBetweenIterations value cannot be negative. | exception | error | animation, validation, timespan, avalonia |
| IterationCount value cannot be larger than long.MaxValue. | exception | error | animation, validation, numeric-overflow, avalonia |
| Animator has no property specified. | exception | error | animation, configuration, nullable-property, avalonia |
| KeyFrame value can't be null. | validation | error | animation, nullable-value, keyframe, avalonia |
| KeyFrame value doesnt match property type. | exception | error | animation, type-conversion, keyframe, avalonia |
| Animator has no property specified. | exception | error | animation, configuration, nullable-property, avalonia |
| Animator has no property specified. | exception | error | animation, configuration, nullable-property, brush, avalonia |
| Gradient of type {gradientBrush?.GetType()} is not supported | exception | error | animation, brush, unsupported-type, avalonia |
| Animator has no property specified. | exception | error | animation, configuration, nullable-property, brush, avalonia |
| Animator has no property specified. | exception | error | animation, configuration, nullable-property, transform, avalonia |
| {item.DebugDisplay} must have a value of type {typeof(Transf | validation | error | animation, type-mismatch, transform, keyframe, avalonia |
| This cue object's value should be within or equal to 0.0 and | validation | error | animation, validation, range, cue, avalonia |
| Invalid Cue string "{value}" | validation | error | animation, parsing, culture, cue, avalonia |
| Easing "{e}" was not found in {Namespace} namespace. | validation | error | animation, parsing, easing, avalonia |
| Invalid value | validation | error | animation, validation, enum, iteration-count, avalonia |
| IterationCount can't be a negative number. | validation | error | animation, parsing, validation, iteration-count, avalonia |
| You can only set either {nameof(KeyTime)} or {nameof(Cue)}. | validation | error | animation, configuration, keyframe, state-conflict, avalonia |
| {nameof(KeySpline)} must have X coordinates >= 0.0 and <= 1. | validation | error | animation, keyspline, validation, argument |
| Invalid KeySpline X1 value. Must be >= 0.0 and <= 1.0. | validation | error | animation, keyspline, validation, argument |
| Invalid KeySpline X2 value. Must be >= 0.0 and <= 1.0. | validation | error | animation, keyspline, validation, argument |
| Controls for PageSlide must have same parent. | validation | error | animation, pageslide, visual-tree, argument |
| Cannot determine visual parent. | exception | error | animation, pageslide, visual-tree, invalid-operation |
| Transition has no property specified. | exception | error | animation, transition, invalid-operation, configuration |
| Transition has no property specified. | exception | error | animation, transition, invalid-operation, configuration |
| Cannot animate direct property {property} on {display}. | exception | error | animation, transition, styled-property, invalid-operation |
| Unable to locate '{t}'. | exception | error | di, locator, invalid-operation, configuration |
| Unable to locate '{typeof(T)}'. | exception | error | di, locator, invalid-operation, configuration |
| Unsupported AvaloniaProperty type. | exception | error | property-system, avaloniaobject, not-supported |
| Binding returned unsupported {nameof(BindingExpressionBase)} | exception | error | binding, avaloniaobject, not-supported, extension-authoring |
| The property {property.Name} is readonly. | validation | error | property-system, avaloniaobject, readonly, argument |
| Invalid priority ${priority} | validation | error | property-system, binding, priority, argument, bug-in-message |
| Unsupported AvaloniaProperty type. | exception | error | binding, extensions, property-system, not-supported |
| 'name' may not contain periods. | validation | error | property-system, registration, argument, xaml |
| Metadata is already set for {Name} on {type}. | exception | error | property-system, metadata, invalid-operation |
| The metadata is read-only. | exception | error | avalonia, metadata, immutability, property-system |
| Property '{property.Name} not registered on '{o.GetType()} | validation | error | avalonia, property-system, registration, direct-property |
| Attached properties not supported. | exception | error | avalonia, property-system, attached-property, validation |
| Cannot register a non-attached property as attached. | exception | error | avalonia, property-system, registration, attached-property |
| dictionary | exception | error | avalonia, collections, dictionary, null-argument |
| Reset called on collection without reset handler. | exception | error | avalonia, collections, dictionary, reactive, collection-changed |
| items | exception | error | avalonia, collections, list, null-argument |
| array | exception | error | avalonia, collections, list, null-argument, copyto |
| Multi-dimensional arrays are not supported. | exception | error | avalonia, collections, list, copyto, array-validation |
| Non-zero lower bounds are not supported. | exception | error | avalonia, collections, list, copyto, array-validation |
| Invalid index. | exception | error | avalonia, collections, list, copyto, index-validation |
| The target array is too small. | exception | error | avalonia, collections, list, copyto, capacity |
| Invalid array type | exception | error | avalonia, collections, list, copyto, type-validation |
| Could not convert '{s}' to {typeof(T)}. | exception | error | avalonia, collections, type-converter, xaml, parsing |
| Reset called on collection without reset handler. | exception | error | avalonia, collections, list, reactive, collection-changed |
| Collection reset not supported. | exception | error | avalonia, collections, list, reactive, not-supported, collection-changed |
| collection | exception | error | avalonia, collections, reactive, weak-subscription, null-argument |
| collection | exception | info | csharp, debug, debugger-type-proxy, null-argument, pooled |
| Destination span is shorter than the list to be copied. | exception | error | csharp, pooled, span, copy, collections |
| array | exception | error | csharp, pooled, collections, null-argument, copy |
| Stack was empty. | exception | error | csharp, pooled, stack, invalid-operation, collections |
| Collection was modified during enumeration. | exception | error | csharp, pooled, stack, enumeration, invalid-operation |
| Enumeration was not started. | Enumeration has ended. | exception | error | csharp, pooled, stack, enumeration, invalid-operation |
| stack | exception | info | csharp, debug, debugger-type-proxy, null-argument, pooled |
| Destination too short. | exception | error | csharp, pooled, stack, span, copy |
| Overlap alignment mismatch. | exception | warning | csharp, pooled, throwhelper, copy, unreachable |
| Invalid array type. | exception | error | csharp, pooled, collections, array-type, copy |
| Enumeration has not started. | exception | warning | csharp, pooled, throwhelper, enumeration, unreachable |
| Enumeration has ended. | exception | warning | csharp, pooled, throwhelper, enumeration, unreachable |
| Collection was modified during enumeration. | exception | error | csharp, pooled, list, enumeration, invalid-operation |
| Invalid enumerator state: enumeration cannot proceed. | exception | error | csharp, pooled, list, enumeration, invalid-operation |
| No value provided. | exception | warning | csharp, pooled, throwhelper, unreachable |
| Concurrent operations are not supported. | exception | warning | csharp, pooled, throwhelper, concurrency, unreachable |
| Handle is not initialized. | exception | warning | csharp, pooled, throwhelper, handle, unreachable |
| Bad format specifier. | exception | error | pooled-collections, format, dead-code, internal |
| The pseudoclass '{name}' may only be {operation} by the cont | exception | error | classes, pseudoclass, styled-element, controls |
| NameScope is completed, no further registrations are allowed | exception | error | namescope, template, registration, controls |
| Control with the name '{name}' already registered. | exception | error | namescope, duplicate-name, xaml, controls |
| Expected control '{name}' to be '{typeof(T)} but it was '{re | exception | error | namescope, type-mismatch, xaml, controls |
| Could not find control '{name}'. | exception | error | namescope, not-found, key-not-found, xaml |
| The control doesn't have an associated name scope, probably | exception | error | namescope, visual-tree, lifecycle, controls |
| Dictionary reset not supported | exception | error | resource-dictionary, merged-dictionaries, notsupported, styling |
| The ResourceDictionary already has a parent. | exception | error | resource-provider, ownership, resource-dictionary, styling |
| Invalid CornerRadius. | exception | error | cornerradius, parse, format, xaml |
| 'errorType' may not be None | exception | error | binding, bindingnotification, validation, data |
| BindingErrorType may not be None | exception | error | binding, bindingnotification, validation, data |
| BindingValue has no value. | exception | error | binding, bindingvalue, value-access, data |
| Invalid BindingValueType. | exception | error | binding, bindingvalue, enum, internal |
| Cannot add value to DoNothing binding value. | exception | error | binding, bindingvalue, donothing, data |
| Unknown binding path element type {element.GetType().FullNam | exception | error | compiled-binding, binding-path, internal, data |
| Invalid method handle | exception | error | compiled-binding, method-handle, reflection, trimming |
| Unexpected null returned from Type.GetTypeFromHandle in Meth | exception | error | compiled-binding, type-handle, reflection, trimming |
| Two way bindings are not supported with a string format | exception | error | data-binding, string-format, converter, two-way |
| Binding mode cannot be Default. | exception | error | data-binding, binding-mode, validation, internal-api |
| UpdateSourceTrigger cannot be Default. | exception | error | data-binding, update-source-trigger, validation, internal-api |
| Property {Name} doesn't have a getter | exception | error | data-binding, reflection, clr-property, read-only |
| Property {Name} doesn't have a setter | exception | error | data-binding, reflection, clr-property, write-only |
| DataContextNode is invalid in conjunction with a binding sou | exception | error | data-binding, datacontext, source, relative-source |
| Cannot find a DataContext to bind to. | exception | error | data-binding, datacontext, logical-tree |
| {this} already has an owner. | exception | error | data-binding, expression-node, ownership, internal-api |
| LogicalAncestorNode is invalid in conjunction with a binding | exception | error | data-binding, relative-source, logical-tree, ancestor |
| Cannot find an ILogical to get a logical ancestor. | exception | error | data-binding, relative-source, logical-tree, ancestor |
| Could not convert list index '{i}' of type '{argument}' to ' | exception | error | data-binding, indexer, reflection, type-conversion |
| TemplatedParentNode is invalid in conjunction with a binding | exception | error | data-binding, relative-source, templated-parent, control-template |
| Cannot find a StyledElement to get a TemplatedParent. | exception | error | data-binding, relative-source, templated-parent, control-template |
| Cannot find an ILogical to get a visual ancestor. | exception | error | data-binding, relative-source, visual-tree, ancestor |
| Expected indexer argument. | validation | error | data-binding, binding-path, parser, indexer |
| Expected '{delimiter}'. | validation | error | data-binding, binding-path, parser, indexer |
| Expected '{close}'. | validation | error | data-binding, binding-path, parser, indexer |
| Expected '{open}'. | validation | error | data-binding, binding-path, parser, internal-api |
| Expected end of expression. | validation | error | data-binding, binding-path, parser, grammar |
| Unexpected end of expression. | validation | error | avalonia, binding, xaml, binding-expression, parser, syntax-error |
| Invalid attached property name. | validation | error | avalonia, binding, xaml, binding-expression, attached-property, parser, syntax-error |
| Attached Property name expected after '.'. | validation | error | avalonia, binding, xaml, binding-expression, attached-property, parser, syntax-error |
| Expected ')'. | validation | error | avalonia, binding, xaml, binding-expression, attached-property, parser, syntax-error, unbalanced-parens |
| Indexer may not be empty. | validation | error | avalonia, binding, xaml, binding-expression, indexer, parser, syntax-error |
| Element name expected after '#'. | validation | error | avalonia, binding, xaml, binding-expression, element-name, parser, syntax-error |
| Too many arguments in RelativeSource syntax sugar | validation | error | avalonia, binding, xaml, binding-expression, relative-source, parser, syntax-error |
| Unknown RelativeSource mode. | validation | error | avalonia, binding, xaml, binding-expression, relative-source, parser, syntax-error, wpf-migration |
| Invalid expression type in binding expression: {node.NodeTyp | validation | error | avalonia, binding, compiled-binding, expression-tree, visitor, unsupported-operation |
| Invalid indexer in binding expression: {node.NodeType}. | validation | error | avalonia, binding, compiled-binding, expression-tree, indexer, visitor, unsupported-operation |
| Invalid method call in binding expression: '{node.Method.Dec | validation | error | avalonia, binding, compiled-binding, expression-tree, method-call, visitor, unsupported-operation |
| Catch blocks are not allowed in binding expressions. | validation | error | avalonia, binding, compiled-binding, expression-tree, catch-block, visitor, unsupported-operation |
| Dynamic expressions are not allowed in binding expressions. | validation | error | avalonia, binding, compiled-binding, expression-tree, dynamic, visitor, unsupported-operation |
| Element init expressions are not valid in a binding expressi | validation | error | avalonia, binding, compiled-binding, expression-tree, element-init, visitor, unsupported-operation |
| Goto expressions are not supported in binding expressions. | validation | error | compiled-binding, expression-tree, linq, binding |
| Member assignments not supported in binding expressions. | validation | error | compiled-binding, expression-tree, binding |
| Unable to parse '{expression}': expected an instance of '{_h | exception | error | compiled-binding, expression-tree, binding-path, binding |
| Cannot find property {type}.{attached.PropertyName}. | exception | error | binding, reflection-binding, attached-property, xaml, trimming |
| Unable to resolve unnamed type from namespace '{@namespace}' | exception | error | binding, reflection-binding, parsing, xaml |
| Unable to resolve type '{@namespace}:{name}'. | exception | error | binding, reflection-binding, xaml, type-resolution, trimming |
| Object of type '{value?.GetType()}' cannot be converted to t | exception | error | binding, type-conversion, inpc, two-way, binding |
| The MethodAccessorPlugin does not support dynamic matching | exception | error | binding, accessor-plugin, compiled-binding, configuration |
| The PropertyInfoAccessorPlugin does not support dynamic matc | exception | error | binding, accessor-plugin, compiled-binding, configuration |
| A member accessor can be subscribed to only once. | exception | error | binding, accessor, subscription, lifecycle |
| The member accessor was not subscribed. | exception | error | binding, accessor, subscription, lifecycle |
| This should be used only in a binding expression | exception | error | compiled-binding, stream-binding, async, binding |
| BindingExpression has not been started. | exception | error | bindings, bindingexpression, invalidoperation, valuestore |
| Cannot call AsObservable on a to binding expression which is | exception | error | bindings, observable, bindingexpression, invalidoperation |
| BindingExpression was already attached. | exception | error | bindings, bindingexpression, attach, invalidoperation |
| BindingExpression was already attached to a different proper | exception | error | bindings, bindingexpression, attach, invalidoperation |
| Cannot subscribe to IndexerDescriptor. | exception | error | bindings, indexer, property-path, invalidoperation |
| Optional has no value. | exception | error | optional, nullable, invalidoperation, data |
| Cannot create ElementName binding when NameScope is null | exception | error | bindings, elementname, namescope, xaml, invalidoperation |
| AncestorLevel may not be set to less than 1. | exception | error | bindings, relativesource, findancestor, argument-out-of-range |
| TemplateBinding does not support OneTime or OneWayToSource b | exception | error | bindings, templatebinding, controltemplate, notsupported |
| The property {Name} is readonly. | exception | error | directproperty, readonly, bindings, argument |
| Unrecognized cursor type '{s}'. | exception | error | cursor, parse, input, argument |
| Cannot get system name for {Kind} format {Identifier} | exception | error | dataformat, clipboard, drag-drop, invalidoperation |
| Invalid application identifier | exception | error | dataformat, validation, argument, clipboard |
| Only Next, Previous, Up, Down, Left and Right directions are | exception | error | focus, navigation, argument-out-of-range, input |
| Unknown format specifier | exception | error | keygesture, format, input, formatexception |
| Either 'e' or 'container' must be non-null. | exception | error | tabnavigation, focus, navigation, invalidoperation |
| Cannot raise an event whose RoutedEvent is null. | exception | error | events, routedevent, interactivity, argument |
| eventArgsType must be derived from RoutedEventArgs. | exception | error | routed-event, interactivity, type-validation, registration |
| Invalid render scaling value {scaling} | exception | error | layout, rendering, dpi, scaling, platform |
| Attempt to call InvalidateMeasure on wrong LayoutManager. | exception | error | layout, layout-manager, visual-tree, reparenting |
| Attempt to call InvalidateArrange on wrong LayoutManager. | exception | error | layout, layout-manager, visual-tree, reparenting |
| Cannot call Measure using a size with NaN values. | exception | error | layout, measure, nan, custom-panel |
| Invalid size returned for Measure. | exception | error | layout, measure, custom-control, measurecore |
| Invalid Arrange rectangle. | exception | error | layout, arrange, custom-panel, nan |
| Transform is not invertible. | exception | error | matrix, transform, math, invertible, rendering |
| Invalid brush string: '{s}'. | exception | error | brush, parsing, media, color, format |
| Unknown CacheMode: {s} | exception | error | cache-mode, parsing, media, rendering |
| Invalid color string: '{s}'. | exception | error | color, parsing, media, format |
| Invalid color string: '{s.ToString()}'. | exception | error | color, parsing, media, span, performance |
| Unable to parse effect: {s} | exception | error | effect, parsing, media, blur |
| Animator has no property specified. | exception | error | animation, effect, binding, animator, property |
| Base uri must be an absolute uri. | exception | error | font-family, uri, media, resource |
| Specified family is not supported. | exception | error | font-family, parsing, media, validation |
| Font collection Key should follow the fonts: scheme. | exception | error | font-manager, font-collection, uri, scheme, media |
| Default font family name can't be null or empty. | exception | critical | font-manager, configuration, media, fonts, headless, platform |
| '{FontFamily.DefaultFontFamilyName}' is a placeholder and ca | exception | error | font-manager, configuration, media, fonts, placeholder |
| No cmap table found. | exception | error | font, opentype, cmap, typeface, media, corrupt-data |
| No suitable cmap subtable found. | exception | error | fonts, font-parsing, cmap, glyph-typeface, asset-validation |
| Could not load the '{TableName}' table. | exception | error | fonts, font-parsing, maxp, glyph-typeface, corruption |
| Stream is not readable | exception | error | io, stream, fonts, precondition, argument-validation |
| Cannot dispose while memory is pinned. | exception | critical | fonts, lifecycle, dispose, concurrency, pinning, native-memory |
| The parameter value must be greater than zero. | exception | error | text, formatted-text, font-size, argument-validation, precondition |
| The parameter value cannot be greater than '{MaxFontEmSize}' | exception | error | text, formatted-text, font-size, bounds, overflow, argument-validation |
| The parameter value must be a number. | exception | error | text, formatted-text, font-size, nan, numeric-safety, argument-validation |
| Parameter must be greater than or equal to zero. | exception | error | text, formatted-text, layout, line-height, argument-validation |
| 'MaxTextHeight' property value must be greater than zero. | exception | error | text, formatted-text, layout, height, argument-validation |
| 'MaxTextHeight' property value cannot be NaN. | exception | error | text, formatted-text, layout, height, nan, numeric-safety |
| Output span must be at least as long as input span | exception | error | text, glyph-typeface, spans, buffer-size, argument-validation |
| Invalid HSL color string: '{s}'. | exception | error | color, hsl, parsing, format-exception, argument-validation |
| Invalid HSV color string: '{s}'. | exception | error | color, hsv, parsing, format-exception, argument-validation |
| sourceRect | validation | error | imaging, bitmap, source-rect, bounds, argument-validation |
| stride | validation | error | imaging, bitmap, stride, pixel-format, buffer-size, argument-validation |
| bufferSize | validation | error | imaging, bitmap, buffer-size, overflow, stride, argument-validation |
| CopyPixels is not supported for this bitmap type | exception | error | imaging, bitmaps, copypixels, notsupported |
| CopyPixels is not supported for transcoded bitmaps | exception | error | imaging, bitmaps, copypixels, transcode, notsupported |
| Only IBitmap supported as source | validation | error | imaging, croppedbitmap, type-mismatch |
| Pixel format {format} is not supported | exception | error | imaging, pixelformat, notsupported, transcode |
| Pixel format {format} is not supported | exception | error | imaging, pixelformat, notsupported, transcode |
| stride | validation | error | imaging, writeablebitmap, argument, stride |
| Size should be >= (1,1) | validation | error | imaging, writeablebitmap, argument, validation |
| Pixel format {finalFormat} is not supported | exception | error | imaging, writeablebitmap, pixelformat, notsupported |
| source | validation | error | rendering, drawingcontext, argumentnull, bitmaps |
| glyphRun | validation | error | rendering, drawingcontext, text, argumentnull |
| ImmediateDrawingContext | exception | error | rendering, drawingcontext, objectdisposed, lifecycle |
| DrawingContext | exception | error | rendering, drawingcontext, objectdisposed, lifecycle |
| Wrong Push/Pop state order | exception | error | rendering, drawingcontext, lifecycle, invalidoperation |
| Transform container stack is non-empty | exception | error | rendering, drawingcontext, lifecycle, invalidoperation |
| material | validation | error | media, acrylic, argumentnull |
| Infinite layout loop detected | exception | error | layout, rendering, invalidoperation, infinite-loop |
| geometryContext | validation | error | avalonia, path-markup, null-argument, constructor, geometry |
| Unsupported command | exception | error | avalonia, path-markup, defensive, unreachable, switch |
| Invalid fill rule. | exception | error | avalonia, path-markup, fill-rule, invalid-data, parse |
| Invalid fill rule | exception | error | avalonia, path-markup, fill-rule, invalid-data, parse |
| Invalid bool rule. | exception | error | avalonia, path-markup, arc, invalid-data, parse |
| Invalid bool rule | exception | error | avalonia, path-markup, arc, invalid-data, parse |
| Invalid double value | exception | error | avalonia, path-markup, number, invalid-data, parse, localization |
| Unexpected path command '{c}'. | exception | error | avalonia, path-markup, command, invalid-data, parse |
| PathMarkupParser | exception | error | avalonia, path-markup, disposed, objectdisposed, lifecycle |
| glyphRun | validation | error | avalonia, drawing-context, glyph, null-argument, text |
| PlatformDrawingContext | exception | error | avalonia, drawing-context, transform, disposed, unbalanced |
| Not all states are disposed | exception | error | avalonia, drawing-context, transform, unbalanced, dispose, lifecycle |
| points | validation | error | avalonia, path-segment, bezier, null-argument, constructor |
| maxDegree must be between 1 and 3 | validation | error | avalonia, arc, bezier, argument, configuration |
| defaultFlatness must be greater than 1.0e-10 | validation | error | avalonia, arc, bezier, argument, configuration, flatness |
| degree should be between {1} and {_maxDegree} | validation | error | avalonia, arc, bezier, argument, error-estimation |
| Text decoration already specified. | validation | error | avalonia, text, text-decoration, duplicate, parse |
| Could not parse text decoration. | validation | error | avalonia, text, text-decoration, parse, enum |
| Invalid {nameof(TextRunProperties.FontRenderingEmSize)} | validation | error | text-formatting, font-size, argument-validation, avalonia |
| {nameof(textLength)} ('0') must be a non-zero value. | validation | error | text-formatting, text-bounds, argument-validation, avalonia |
| Invalid text trimming string: '{s}'. | validation | error | text-trimming, parse, format-exception, avalonia |
| Invalid transform string: '{s}'. | validation | error | transform, parse, format-exception, avalonia |
| s | validation | error | transform, parse, argument-exception, null-check, avalonia |
| Too many provided values. | validation | error | transform, parse, format-exception, argument-count, avalonia |
| Invalid value {value.Value} {unitString} for {function} | validation | error | transform, parse, format-exception, unit-validation, avalonia |
| Invalid format. {function} expects {count} value(s). | validation | error | transform, parse, format-exception, argument-count, avalonia |
| Invalid unit: {part.ToString()} | validation | error | transform, parse, format-exception, unit-validation, avalonia |
| Font weight must be > 0. | validation | error | font, typeface, argument-validation, avalonia |
| Font stretch must be > 1. | exception | error | font, typeface, argument-validation, avalonia |
| Could not create glyphTypeface. Font family: {FontFamily?.Na | exception | error | font, typeface, glyph, font-loading, avalonia |
| Could not parse specified Unicode range. | exception | error | unicode, parse, format-exception, avalonia |
| Could not parse specified Unicode range segment. | exception | error | unicode, parse, format-exception, avalonia |
| Invalid PixelSize. | exception | error | pixel-size, parse, format-exception, avalonia |
| Assembly {name} needs to be referenced and explicitly loaded | exception | error | assembly-loading, nativeaot, trimming, resources, avalonia |
| Could not find manifest resource stream '{_name}', | exception | error | avalonia, assets, embedded-resource, manifest, resource-loading |
| Could not find manifest resource stream '{Constants.Avalonia | exception | error | avalonia, assets, avares, avalonia-resource, resource-loading |
| The resource {uri} could not be found. | exception | error | avalonia, assets, asset-loader, uri, resource-loading |
| Unable to select a suitable storage provider | exception | error | avalonia, storage, file-picker, platform, io |
| Value cannot be null. (Parameter 'fileInfo') | exception | error | avalonia, launcher, argumentnull, file-info, validation |
| Value cannot be null. (Parameter 'directoryInfo') | exception | error | avalonia, launcher, argumentnull, directory-info, validation |
| {value} is not a valid value for '{property.Name}'. | exception | error | avalonia, styled-property, validation, value-store, argument |
| Value cannot be null. (Parameter 'tcs') | exception | error | avalonia, reactive, observer, argumentnull, tcs |
| Value cannot be null. (Parameter 'onNext') | exception | error | avalonia, reactive, observer, argumentnull, callback |
| Value cannot be null. (Parameter 'onError') | exception | error | avalonia, reactive, observer, argumentnull, error-handling |
| Specified argument was out of the range of valid values. (Pa | exception | error | avalonia, reactive, disposables, argumentoutofrange, capacity |
| Value cannot be null. (Parameter 'disposables') | exception | error | avalonia, reactive, disposables, argumentnull, params-array |
| Disposables can't contain null | exception | error | avalonia, reactive, disposables, argument, null-element |
| Value cannot be null. (Parameter 'item') | exception | error | avalonia, reactive, disposables, argumentnull, add |
| Value cannot be null. (Parameter 'array') | exception | error | avalonia, reactive, disposables, argumentnull, copyto |
| Specified argument was out of the range of valid values. (Pa | exception | error | avalonia, reactive, disposables, argumentoutofrange, copyto, bounds |
| Value cannot be null. (Parameter 'dispose') | exception | error | reactive, null-argument, disposable, internal-api |
| Value cannot be null. (Parameter 'compositeDisposable') | exception | error | reactive, null-argument, composite-disposable, lifecycle |
| Value cannot be null. (Parameter 'observer') | exception | error | reactive, null-argument, observer, ui-thread |
| Skip count must be bigger than zero | exception | error | reactive, argument-validation, skip, off-by-one |
| Value cannot be null. (Parameter 'observer') | exception | error | reactive, null-argument, observer, single-subscriber, ui-thread |
| The observable can only be subscribed once. | exception | error | reactive, single-subscriber, invalid-operation, lifecycle, binding |
| If one coordinate is relative, both must be. | exception | error | xaml, parsing, relativepoint, format-exception, markup |
| If one coordinate is relative, all must be. | exception | error | xaml, parsing, relativerect, format-exception, markup |
| Minimum allowed value is 1ms and maximum allowed value is 24 | exception | error | animation, composition, argument-validation, timespan, bug |
| Animation has no key frames | exception | error | animation, composition, invalid-operation, key-frames, lifecycle |
| Invalid animation duration | exception | error | animation, composition, invalid-operation, timespan, defensive-check |
| Key frame key | exception | error | animation, composition, key-frames, argument-validation |
| Key frame key {key} is less than the previous one | exception | error | animation, composition, key-frames, ordering, argument-validation |
| Visual was invalidated during the render pass | exception | error | rendering, composition, invalid-operation, reentrancy, threading |
| Object is not yet attached to the compositor | exception | error | rendering, composition, invalid-operation, lifecycle, custom-visual |
| This API is only available from OnRender | exception | error | rendering, composition, invalid-operation, render-scope, custom-visual |
| CompositionImportedGpuImage | exception | error | rendering, composition, gpu, object-disposed, interop |
| CompositionImportedGpuSemaphore | exception | error | rendering, composition, gpu, object-disposed, interop, semaphore |
| There is no server-side counterpart for this object | exception | error | composition, compositor, serialization, internal-invariant |
| Unknown property {propertyName} | exception | error | composition, animation, property-name, argument |
| propertyName | exception | error | composition, animation, argument-null, validation |
| Animation Target can't be null | exception | error | composition, animation, animation-group, argument |
| The object doesn't have an associated server counterpart | exception | error | composition, compositor, serialization, subclassing, internal-invariant |
| obj | exception | error | composition, animation, property-set, argument-null, validation |
| PropertySet depth limit reached | exception | error | composition, property-set, snapshot, limits |
| Object of type {o.Value.GetType()} is not allowed | exception | error | composition, property-set, snapshot, type-mismatch |
| This resource is disposed | exception | error | composition, resource, refcount, disposed |
| This resource doesn't exist on that compositor | exception | error | composition, resource, compositor, cross-compositor |
| {resource.GetType().FullName} can not be used with this Draw | exception | error | composition, drawing, drawing-context, resource, type-mismatch |
| {o.GetType()} is not compatible with composition | exception | error | composition, drawing, resource, type-mismatch |
| {o.GetType()} belongs to a different compositor | exception | error | composition, compositor, cross-compositor, brush |
| Composition visuals belong to different compositor instances | exception | error | composition, compositor, cross-compositor, visual-tree |
| Unexpected data | exception | error | |
| Unexpected '{token}' | exception | error | |
| Unexpected end of expression | exception | error | |
| Unexpected token | exception | error | |
| Unexpected end of the expression | exception | error | |
| Invalid variant type: {typeof(T)} | exception | error | |
| Visual already has a parent | exception | error | |
| Cannot set Name : styled element already styled. | exception | error | |
| BeginInit was not called. | exception | error | |
| The Control already has a parent. | exception | error | |
| Cannot add null to LogicalChildren. | validation | error | |
| Invalid value for Property '{propertyName}': '{value}' ({typ | validation | error | |
| '{defaultValue}' is not a valid default value for '{property | validation | error | |
| Container cannot be added as a nested style. | exception | error | |
| ControlThemes cannot be added as a nested style. | exception | error | |
| ControlTheme has no TargetType. | exception | error | |
| Descendant selector must be preceded by a selector. | exception | error | |
| ControlTheme has no TargetType. | exception | error | |
| Nesting selector was specified but cannot determine parent s | exception | error | avalonia, styling, nesting-selector, style-hierarchy |
| Not selector must have a selector argument. | exception | error | avalonia, styling, not-selector, null-argument |
| Need more than one query to OR. | exception | error | avalonia, styling, or-query, container-query, validation |
| Need more than one selector to OR. | exception | error | avalonia, styling, or-selector, validation |
| ControlTheme style may not directly contain a child or desce | exception | error | avalonia, styling, controltheme, combinator, template-selector |
| ControlTemplate styles cannot contain multiple template sele | exception | error | avalonia, styling, controltheme, template-selector, validation |
| Child styles must have a nesting selector. | exception | error | avalonia, styling, nesting-selector, child-style, validation |
| Name may not be empty | exception | error | avalonia, styling, class-selector, validation, argument |
| Don't know how to instance a style on this type. | exception | error | avalonia, styling, setter, avaloniaobject, type-mismatch |
| Setter.Property must be set. | exception | error | avalonia, styling, setter, property, validation |
| Cannot set direct property '{Property}' in '{instance.Source | exception | error | avalonia, styling, setter, direct-property, activator |
| Cannot set Class Binding property '(Classes.{classPropertyNa | exception | error | avalonia, styling, setter, classes-binding, activator |
| Setter value '{Value}' is not a valid value for property '{P | exception | error | avalonia, styling, setter, value-validation, type-mismatch |
| Child styles must have a selector. | exception | error | avalonia, styling, style, child-style, selector |
| Invalid selector: Template selector must be followed by cont | exception | error | avalonia, styling, template-selector, selector, validation |
| Cannot add {child.GetType()} to a style. | exception | error | avalonia, styling, iaddchild, xaml, type-mismatch |
| Styles can only be applied to AvaloniaObjects. | exception | error | avalonia, styling, invariant, type-system, null-target |
| owner | exception | error | avalonia, styling, resources, null-argument, ownership |
| The Style already has a parent. | exception | error | avalonia, styling, resources, ownership, invalid-operation |
| Duplicate setter encountered for property '{valueEntry.Prope | exception | error | avalonia, styling, setters, xaml, duplicate, invalid-operation |
| Resources | exception | error | avalonia, styling, resources, null-argument, resource-dictionary |