existing code loaded everyone in VS who MEF exported ITableColumnDefi…

…nition. now we make sure we only load one that we care (#36562)

src/VisualStudio/Core/Def/Implementation/FindReferences/NameMetadata.cs

@@ -0,0 +1,17 @@
+// 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.Collections.Generic;
+using Roslyn.Utilities;
+
+namespace Microsoft.VisualStudio.LanguageServices.FindUsages
+{
+    internal class NameMetadata
+    {
+        public string Name { get; }
+
+        public NameMetadata(IDictionary<string, object> data)
+        {
+            this.Name = (string)data.GetValueOrDefault(nameof(Name));
+        }
+    }
+}

src/VisualStudio/Core/Def/Implementation/FindReferences/StreamingFindUsagesPresenter.cs

@@ -15,6 +15,7 @@
 using Microsoft.VisualStudio.Shell.FindAllReferences;
 using Microsoft.VisualStudio.Shell.TableControl;
 using Microsoft.VisualStudio.Text.Classification;
+using EnvDTE;
 
 namespace Microsoft.VisualStudio.LanguageServices.FindUsages
 {
@@ -50,8 +51,14 @@ public StreamingFindUsagesPresenter(
             ClassificationTypeMap typeMap,
             IEditorFormatMapService formatMapService,
             IClassificationFormatMapService classificationFormatMapService,
-            [ImportMany]IEnumerable<ITableColumnDefinition> columns)
-            : this(workspace, threadingContext, serviceProvider, typeMap, formatMapService, classificationFormatMapService, columns)
+            [ImportMany]IEnumerable<Lazy<ITableColumnDefinition, NameMetadata>> columns)
+            : this(workspace,
+                   threadingContext,
+                   serviceProvider,
+                   typeMap,
+                   formatMapService,
+                   classificationFormatMapService,
+                   columns.Where(c => c.Metadata.Name == FindUsagesValueUsageInfoColumnDefinition.ColumnName).Select(c => c.Value))
         {
         }