{"record":{"id":"e4ec5ba96f782774","repo":"dotnet/wpf","slug":"sr-animation-notextchildren-int16animationusingkeyframes","errorCode":null,"errorMessage":"SR.Animation_NoTextChildren","messagePattern":"SR\\.Animation_NoTextChildren","errorType":"exception","errorClass":"InvalidOperationException","httpStatus":null,"severity":"error","filePath":"src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Media/Animation/Generated/Int16AnimationUsingKeyFrames.cs","lineNumber":277,"sourceCode":"        /// WritePreamble() or WritePostscript().  It also doesn't throw an\n        /// ArgumentNullException if the childText parameter is null.  These tasks\n        /// are performed by the interface implementation.  Therefore, it's OK\n        /// for a derived class to override this method and call the base\n        /// class implementation only if they determine that it's the right\n        /// course of action.  The derived class can rely on KeyFrameAnimation's\n        /// implementation of IAddChild.AddChild or implement their own\n        /// following the Freezable pattern since that would be a public\n        /// method.\n        /// </remarks>\n        /// <param name=\"childText\">A string representing the child text that\n        /// should be added.  If this is a KeyFrameAnimation an exception will be\n        /// thrown.</param>\n        /// <exception cref=\"InvalidOperationException\">Timelines have no way\n        /// of adding text.</exception>\n        [EditorBrowsable(EditorBrowsableState.Advanced)]\n        protected virtual void AddText(string childText)\n        {\n            throw new InvalidOperationException(SR.Animation_NoTextChildren);\n        }\n\n        #endregion\n\n        #region Int16AnimationBase\n\n        /// <summary>\n        /// Calculates the value this animation believes should be the current value for the property.\n        /// </summary>\n        /// <param name=\"defaultOriginValue\">\n        /// This value is the suggested origin value provided to the animation\n        /// to be used if the animation does not have its own concept of a\n        /// start value. If this animation is the first in a composition chain\n        /// this value will be the snapshot value if one is available or the\n        /// base property value if it is not; otherise this value will be the \n        /// value returned by the previous animation in the chain with an \n        /// animationClock that is not Stopped.\n        /// </param>","sourceCodeStart":259,"sourceCodeEnd":295,"githubUrl":"https://github.com/dotnet/wpf/blob/81131a70a4c573cd62748a5c36908fc4d662daa9/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Media/Animation/Generated/Int16AnimationUsingKeyFrames.cs#L259-L295","documentation":"Int16AnimationUsingKeyFrames.AddText throws InvalidOperationException(SR.Animation_NoTextChildren) unconditionally: timelines have no way of adding text. It exists to complete the IAddChild pattern; any text content inside the element triggers it.","triggerScenarios":"Placing literal text inside an <Int16AnimationUsingKeyFrames> element in XAML, causing IAddChild.AddText to be invoked during parsing.","commonSituations":"Typing frame values as text inside the element instead of on key frame attributes; whitespace/text artifacts from copy-paste in XAML.","solutions":["Remove text content from the element","Express values via Int16KeyFrame children with Value/KeyTime attributes","Move the intended value onto the animation's From/To/By or key frames"],"exampleFix":"// before (XAML)\n<Int16AnimationUsingKeyFrames>10, 20, 30</Int16AnimationUsingKeyFrames>\n// after\n<Int16AnimationUsingKeyFrames>\n  <LinearInt16KeyFrame Value=\"10\" KeyTime=\"0:0:0\" />\n  <LinearInt16KeyFrame Value=\"30\" KeyTime=\"0:0:1\" />\n</Int16AnimationUsingKeyFrames>","handlingStrategy":"validation","validationCode":"// Ensure no text nodes inside animation elements before parsing XAML:\n// element.Nodes().OfType<XText>().All(t => string.IsNullOrWhiteSpace(t.Value))","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Never author text content inside timeline elements","Use Value/KeyTime attributes on Int16KeyFrame children to specify frame data","Validate XAML with a linter that detects text in IAddChild-only containers"],"tags":["wpf","animation","xaml","unsupported-operation","text-content"],"backgroundTag":"unsupported-operation","analyzedSha":"81131a70a4c573cd62748a5c36908fc4d662daa9","analyzedAt":"2026-09-14T10:12:48.479Z","contentChangedAt":"2026-09-14T10:12:48.479Z","schemaVersion":2},"datasetVersion":"2026-09-22T01:17:13.364Z"}