У меня следующая проблема с последней версией Visual studio 2019 для Ma c. Я получаю сообщение об ошибке для всех android xaml превью:
System.ArgumentException: An item with the same key has already been added. Key: Android.Support.V4.Media.Session.MediaSessionCompat+IOnActiveChangeListenerImplementor
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x002b5] in /Users/builder/jenkins/workspace/build-package-osx-mono/2019-10/external/bockbuild/builds/mono-x64/external/corefx/src/Common/src/CoreLib/System/Collections/Generic/Dictionary.cs:677
at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in /Users/builder/jenkins/workspace/build-package-osx-mono/2019-10/external/bockbuild/builds/mono-x64/external/corefx/src/Common/src/CoreLib/System/Collections/Generic/Dictionary.cs:240
at Xamarin.AndroidDesigner.Java.JcwWrapperGenerator.GenerateAsync () [0x001b5] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Android/Xamarin.AndroidDesigner/Java/JcwWrapperGenerator.cs:32
at Xamarin.Designer.Tasks.WhenBoth[T1,T2] (System.Threading.Tasks.Task`1[TResult] task1, System.Threading.Tasks.Task`1[TResult] task2) [0x0003b] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer/Xamarin.Designer/TaskExtensions.cs:112
at Xamarin.AndroidDesigner.DesignerProject.SynchronizeAssemblies (System.Boolean firstSync) [0x001f1] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Android/Xamarin.AndroidDesigner/DesignerProject.cs:1814
at Xamarin.Designer.Telemetry.TimingTaskExtensions.AsTimedOperationInternal (System.Threading.Tasks.Task originalTask, System.String eventName, Xamarin.Designer.Telemetry.ITelemetryCorrelation correlation, Xamarin.Designer.Telemetry.TelemetryProperties properties, Xamarin.Designer.Telemetry.ITimingReporter reporter, System.Boolean sendToTelemetry) [0x000d5] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer/Xamarin.Designer/Telemetry/DesignerTelemetry.cs:240
at Xamarin.AndroidDesigner.DesignerProject.InitializeIdeProjectAsync () [0x005e4] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Android/Xamarin.AndroidDesigner/DesignerProject.cs:199
at Xamarin.AndroidDesigner.AndroidDesignerService.LoadProjectAsync (Xamarin.AndroidDesigner.IIdeProject ideProject, System.String resourcesDir, System.String projectResourcesDir) [0x00069] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Android/Xamarin.AndroidDesigner/AndroidDesignerService.cs:540
at Xamarin.AndroidDesigner.MonoDevelop.AndroidProjectWrapper.FromProjectAsync (Xamarin.AndroidDesigner.AndroidDesignerService service, MonoDevelop.Projects.Project project) [0x00097] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Android/Xamarin.AndroidDesigner.MonoDevelop/AndroidProjectWrapper.cs:102
at Xamarin.Designer.Forms.XamarinStudioXamlPreviewerView.InitializeAndroidDesignerProject (MonoDevelop.Projects.DotNetProject androidProject) [0x00030] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Forms/Xamarin.FormsPreviewer.MonoDevelop/Xamarin.Designer.Forms/XamarinStudioXamlPreviewerView.cs:575
at Xamarin.Designer.Forms.Preview.AndroidXamlRenderer.EnsureAndroidIsReady () [0x00078] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Forms/Xamarin.Designer.Forms.Preview/Android/AndroidXamlRenderer.cs:90
at Xamarin.Designer.Forms.Preview.AndroidXamlRenderer.RenderOneXaml (MonoTouch.Design.XamlRenderContext context) [0x0004b] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Forms/Xamarin.Designer.Forms.Preview/Android/AndroidXamlRenderer.cs:129
at Xamarin.Designer.Forms.Preview.AndroidXamlRenderer.RenderXamls (MonoTouch.Design.XamlRenderContext context, System.Threading.CancellationToken token) [0x003c1] in /Users/runner/runners/2.165.0/work/1/s/Xamarin.Designer.Forms/Xamarin.Designer.Forms.Preview/Android/AndroidXamlRenderer.cs:293
У меня нет проблем с iOS версией. Кто-нибудь знает, почему это отображается?