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. 351 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Enumeration has not started. | exception | warning | csharp, pooled, throwhelper, enumeration, unreachable |
| Could not find manifest resource stream | exception | error | avalonia, assets, embedded-resource, manifest, resource-loading |
| CopyPixels is not supported for this bitmap type | exception | error | imaging, bitmaps, copypixels, notsupported |
| Assembly needs to be referenced and explicitly loaded… | exception | error | assembly-loading, nativeaot, trimming, resources, avalonia |
| eventArgsType must be derived from RoutedEventArgs. | exception | error | routed-event, interactivity, type-validation, registration |
| Invalid indexer in binding expression | validation | error | avalonia, binding, compiled-binding, expression-tree, indexer, visitor, unsupported-operation |
| Styles can only be applied to AvaloniaObjects. | exception | error | avalonia, styling, invariant, type-system, null-target |
| Collection was modified during enumeration. | exception | error | csharp, pooled, list, enumeration, invalid-operation |
| Overlap alignment mismatch. | exception | warning | csharp, pooled, throwhelper, copy, unreachable |
| There is no server-side counterpart for this object | exception | error | composition, compositor, serialization, internal-invariant |
| Invalid expression type in binding expression | validation | error | avalonia, binding, compiled-binding, expression-tree, visitor, unsupported-operation |
| Unknown binding path element type | exception | error | compiled-binding, binding-path, internal, data |
| Invalid enumerator state: enumeration cannot proceed. | exception | error | csharp, pooled, list, enumeration, invalid-operation |
| Unable to parse ' ': expected an instance of ' ' but got '… | exception | error | compiled-binding, expression-tree, binding-path, binding |
| Unsupported command | exception | error | avalonia, path-markup, defensive, unreachable, switch |
| Cannot set direct property | exception | error | avalonia, styling, setter, direct-property, activator |
| Enumeration has ended. | exception | warning | csharp, pooled, throwhelper, enumeration, unreachable |
| Cannot find property | exception | error | binding, reflection-binding, attached-property, xaml, trimming |
| Invalid array type. | exception | error | csharp, pooled, collections, array-type, copy |
| ' ' is a placeholder and cannot be used as the default font… | exception | error | font-manager, configuration, media, fonts, placeholder |
| Attached Property name expected after '.'. | validation | error | avalonia, binding, xaml, binding-expression, attached-property, parser, syntax-error |
| Invalid method call in binding expression | validation | error | avalonia, binding, compiled-binding, expression-tree, method-call, visitor, unsupported-operation |
| Goto expressions are not supported in binding expressions. | validation | error | compiled-binding, expression-tree, linq, binding |
| Unexpected end of expression. | validation | error | avalonia, binding, xaml, binding-expression, parser, syntax-error |
| The MethodAccessorPlugin does not support dynamic matching | exception | error | binding, accessor-plugin, compiled-binding, configuration |
| Invalid transform string | validation | error | transform, parse, format-exception, avalonia |
| Concurrent operations are not supported. | exception | warning | csharp, pooled, throwhelper, concurrency, unreachable |
| CopyPixels is not supported for transcoded bitmaps | exception | error | imaging, bitmaps, copypixels, transcode, notsupported |
| Minimum allowed value is 1ms and maximum allowed value is… | exception | error | animation, composition, argument-validation, timespan, bug |
| Bad format specifier. | exception | error | pooled-collections, format, dead-code, internal |
| can not be used with this DrawingContext | exception | error | composition, drawing, drawing-context, resource, type-mismatch |
| No suitable cmap subtable found. | exception | error | fonts, font-parsing, cmap, glyph-typeface, asset-validation |
| Invalid priority | validation | error | property-system, binding, priority, argument, bug-in-message |
| Unknown property | exception | error | composition, animation, property-name, argument |
| No value provided. | exception | warning | csharp, pooled, throwhelper, unreachable |
| Attempt to call InvalidateMeasure on wrong LayoutManager. | exception | error | layout, layout-manager, visual-tree, reparenting |
| Child styles must have a nesting selector. | exception | error | avalonia, styling, nesting-selector, child-style, validation |
| Vulkan D3DDevice wasn't created | exception | error | vulkan, d3d11, windows, external-memory, interop, sample |
| Resources | exception | error | avalonia, styling, resources, null-argument, resource-dictionary |
| degree should be between | validation | error | avalonia, arc, bezier, argument, error-estimation |
| DataContextNode is invalid in conjunction with a binding… | exception | error | data-binding, datacontext, source, relative-source |
| Invalid attached property name. | validation | error | avalonia, binding, xaml, binding-expression, attached-property, parser, syntax-error |
| Two way bindings are not supported with a string format | exception | error | data-binding, string-format, converter, two-way |
| Cannot set Class Binding property | exception | error | avalonia, styling, setter, classes-binding, activator |
| Duplicate setter encountered for property | exception | error | avalonia, styling, setters, xaml, duplicate, invalid-operation |
| Duration value cannot be negative. | exception | error | animation, validation, timespan, avalonia |
| Unable to resolve type | exception | error | binding, reflection-binding, xaml, type-resolution, trimming |
| Pixel format is not supported | exception | error | imaging, pixelformat, notsupported, transcode |
| Peer instance does not implement | exception | error | android, accessibility, automation-peer, a11y, generic-type, message-bug |
| result.GetStringExtra("error") | exception | error | android, storage, picker, saf, error-propagation |
| Invalid Arrange rectangle. | exception | error | layout, arrange, custom-panel, nan |
| Handle is not initialized. | exception | warning | csharp, pooled, throwhelper, handle, unreachable |
| Invalid double value | exception | error | avalonia, path-markup, number, invalid-data, parse, localization |
| Invalid | validation | error | text-formatting, font-size, argument-validation, avalonia |
| Could not create glyphTypeface. Font family | exception | error | font, typeface, glyph, font-loading, avalonia |
| Too many arguments in RelativeSource syntax sugar | validation | error | avalonia, binding, xaml, binding-expression, relative-source, parser, syntax-error |
| Unable to select a suitable storage provider | exception | error | avalonia, storage, file-picker, platform, io |
| Value cannot be null. (Parameter 'dispose') | exception | error | reactive, null-argument, disposable, internal-api |
| This should be used only in a binding expression | exception | error | compiled-binding, stream-binding, async, binding |
| Collection reset not supported. | exception | error | avalonia, collections, list, reactive, not-supported, collection-changed |
| The pseudoclass ' ' may only be by the control itself. | exception | error | classes, pseudoclass, styled-element, controls |
| ControlTheme style may not directly contain a child or… | exception | error | avalonia, styling, controltheme, combinator, template-selector |
| Object of type is not allowed | exception | error | composition, property-set, snapshot, type-mismatch |
| Stack was empty. | exception | error | csharp, pooled, stack, invalid-operation, collections |
| Animator has no property specified. | exception | error | animation, effect, binding, animator, property |
| Object of type ' ' cannot be converted to type ' '. | exception | error | binding, type-conversion, inpc, two-way, binding |
| Destination too short. | exception | error | csharp, pooled, stack, span, copy |
| Main activity must implement IActivityResultHandler… | exception | critical | android, activity, storage, picker, startup |
| Invalid render scaling value | exception | error | layout, rendering, dpi, scaling, platform |
| NameScope is completed, no further registrations are allowed | exception | error | namescope, template, registration, controls |
| Value cannot be null. (Parameter 'compositeDisposable') | exception | error | reactive, null-argument, composite-disposable, lifecycle |
| Invalid value for | validation | error | transform, parse, format-exception, unit-validation, avalonia |
| Destination span is shorter than the list to be copied. | exception | error | csharp, pooled, span, copy, collections |
| Invalid format. expects value(s). | validation | error | transform, parse, format-exception, argument-count, avalonia |
| Expected ')'. | validation | error | avalonia, binding, xaml, binding-expression, attached-property, parser, syntax-error, unbalanced-parens |
| Can not create ' ' because a directory with the same name… | exception | error | android, storage, io, name-conflict, saf |
| Expected end of expression. | validation | error | data-binding, binding-path, parser, grammar |
| Invalid color string | exception | error | color, parsing, media, format |
| Unable to parse effect | exception | error | effect, parsing, media, blur |
| Setter value ' ' is not a valid value for property ' '. | exception | error | avalonia, styling, setter, value-validation, type-mismatch |
| Invalid brush string | exception | error | brush, parsing, media, color, format |
| Enumeration was not started. | Enumeration has ended. | exception | error | csharp, pooled, stack, enumeration, invalid-operation |
| Cannot create ElementName binding when NameScope is null | exception | error | bindings, elementname, namescope, xaml, invalidoperation |
| Context.InputMethodService is expected to be not null. | exception | error | android, ime, input-method, context, text-input, platform |
| Unable to obtain ANativeWindow | exception | critical | android, rendering, surface, lifecycle, skia |
| Avalonia Application was not initialized. Make sure you… | exception | critical | android, application-lifecycle, appbuilder, activity, platform |
| The resource could not be found. | exception | error | avalonia, assets, asset-loader, uri, resource-loading |
| is not a valid value for ' '. | exception | error | avalonia, styled-property, validation, value-store, argument |
| Composition visuals belong to different compositor instances | exception | error | composition, compositor, cross-compositor, visual-tree |
| Font collection Key should follow the fonts: scheme. | exception | error | font-manager, font-collection, uri, scheme, media |
| Invalid selector: Template selector must be followed by… | exception | error | avalonia, styling, template-selector, selector, validation |
| Invalid text trimming string | validation | error | text-trimming, parse, format-exception, avalonia |
| must have X coordinates >= 0.0 and <= 1.0. | validation | error | animation, keyspline, validation, argument |
| Nesting selector was specified but cannot determine parent… | exception | error | avalonia, styling, nesting-selector, style-hierarchy |
| stride | validation | error | imaging, writeablebitmap, argument, stride |
| Unable to export IOSurfaceRef | exception | error | vulkan, macos, metal, semaphore, external-semaphore, sample, message-bug |
| No cmap table found. | exception | error | font, opentype, cmap, typeface, media, corrupt-data |
| Application.Context.MainLooper was not expected to be null. | exception | critical | android, dispatcher, looper, ui-thread, platform |
| Invalid fill rule. | exception | error | avalonia, path-markup, fill-rule, invalid-data, parse |
| Object is not yet attached to the compositor | exception | error | rendering, composition, invalid-operation, lifecycle, custom-visual |