Merge pull request #14443 from CyrusNajmabadi/navToCancellation

Deal with a cancellation exception being t hrown through a sync-path in NavigateTo

src/EditorFeatures/CSharpTest/Diagnostics/SpellCheck/SpellCheckTests.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
+using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.CodeFixes;
-using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.CSharp.CodeFixes.Spellcheck;
-using Xunit;
+using Microsoft.CodeAnalysis.Diagnostics;
 using Roslyn.Test.Utilities;
-using Microsoft.CodeAnalysis.CodeActions;
-using System.Collections.Generic;
+using Xunit;
 
 namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Diagnostics.SpellCheck
 {

src/EditorFeatures/Core/Implementation/NavigateTo/NavigateToItemProvider.Searcher.cs

@@ -68,6 +68,9 @@ internal async void Search()
                         await Task.WhenAll(searchTasks).ConfigureAwait(false);
                     }
                 }
+                catch (OperationCanceledException)
+                {
+                }
                 finally
                 {
                     _callback.Done();

src/EditorFeatures/Test/Preview/PreviewWorkspaceTests.cs

@@ -202,7 +202,7 @@ public async Task TestPreviewDiagnosticTagger()
             }
         }
 
-        [WpfFact]
+        [WpfFact(Skip = "https://github.com/dotnet/roslyn/issues/14444")]
         public async Task TestPreviewDiagnosticTaggerInPreviewPane()
         {
             using (var workspace = await TestWorkspace.CreateCSharpAsync("class { }"))