This question is locked. New answers and comments are not allowed.
System.IO.FileNotFoundExceptionCould not load file or assembly 'Microsoft.Silverlight.Testing, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.Assembly.Load(AssemblyName assemblyRef) at MS.Internal.Package.VSIsolationProviderService.RemoteReferenceProxy.LoadAssembly(AssemblyName assemblyName) at MS.Internal.Package.VSIsolationProviderService.RemoteReferenceProxy.System.ComponentModel.Design.IDesignTimeAssemblyLoader.LoadRuntimeAssembly(AssemblyName targetAssemblyName) at Microsoft.VisualStudio.Shell.Design.VsTargetFrameworkUniverse.LoadRuntimeAssembly(AssemblyName assemblyName) at Microsoft.VisualStudio.Shell.Design.VsTargetFrameworkUniverse.ResolveAssemblyFromRuntimeLocation(AssemblyName name) at Microsoft.VisualStudio.Shell.Design.VsTargetFrameworkUniverse.ResolveAssembly(Module scope, Token tokenAssemblyRef) at Microsoft.MetadataReader.MetadataOnlyModule.ResolveTypeRef(ITypeReference typeReference) at Microsoft.MetadataReader.MetadataOnlyTypeReference.GetResolvedTypeWorker() at Microsoft.MetadataReader.TypeProxy.GetResolvedType() at Microsoft.MetadataReader.TypeProxy.GetHashCode() at Microsoft.Windows.Design.Metadata.ReflectionMetadataContext.GetTypeForReflectableType(Reflectable`1 reflectableType) at MS.Internal.Metadata.ClrType.GetTypeMetadata(Type type) at MS.Internal.Metadata.ClrType.get_BaseType() at MS.Internal.Design.Metadata.Xaml.XamlType.<GetAllAttachableProperties>d__7.MoveNext() at MS.Internal.Design.Metadata.Xaml.XamlType.<FindAttachableProperties>d__0.MoveNext() at Microsoft.Windows.Design.Metadata.Xaml.XamlExtensionImplementations.<FindAttachableProperties>d__7.MoveNext() at MS.Internal.VirtualModel.VirtualModelPropertyCollection.<GetUncachedProperties>d__0.MoveNext() at System.Linq.Buffer`1..ctor(IEnumerable`1 source) at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source) at MS.Internal.VirtualModel.VirtualModelPropertyCollection.GetEnumerator() at MS.Internal.Designer.PropertyEditing.Model.Properties.ModelPropertyMerger.<GetFirstProperties>d__0.MoveNext() at MS.Internal.Designer.PropertyEditing.Views.PropertyEntryReader.RedraftEntries(IPropertyViewManager viewManager, Selection selection, Boolean attachedOnly, IEventCodeBehindProxy eventCodeBehindProxy, CategoryList categoryList) at MS.Internal.Designer.PropertyEditing.PropertyInspector.UpdateCategories(Selection selection, Boolean attachedOnly, IEntryReader entryReader) at MS.Internal.Designer.PropertyEditing.PropertyInspector.RefreshPropertyList(Boolean attachedOnly) at MS.Internal.Designer.PropertyEditing.PropertyInspector.OnSelectionChangedIdle()