Pass along typecode so we can properly roundtrip value.

src/EditorFeatures/Core/FindUsages/AbstractFindUsagesService.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.Immutable;
 using System.Linq;
 using System.Threading;
@@ -215,7 +216,7 @@ internal abstract partial class AbstractFindUsagesService : IFindUsagesService
             // We'll take those results, massage them, and forward them along to the 
             // FindUsagesContext instance we were given.
             await SymbolFinder.FindLiteralReferencesAsync(
-                tokenValue, solution, progressAdapter, cancellationToken).ConfigureAwait(false);
+                tokenValue, Type.GetTypeCode(tokenValue.GetType()), solution, progressAdapter, cancellationToken).ConfigureAwait(false);
 
             return true;
         }

src/Workspaces/Core/Portable/FindSymbols/IRemoteSymbolFinder.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.Immutable;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.Remote;
@@ -9,7 +10,7 @@ namespace Microsoft.CodeAnalysis.FindSymbols
     internal interface IRemoteSymbolFinder
     {
         Task FindReferencesAsync(SerializableSymbolAndProjectId symbolAndProjectIdArg, DocumentId[] documentArgs);
-        Task FindLiteralReferencesAsync(object value);
+        Task FindLiteralReferencesAsync(object value, TypeCode typeCode);
 
         Task<ImmutableArray<SerializableSymbolAndProjectId>> FindAllDeclarationsWithNormalQueryAsync(
             ProjectId projectId, string name, SearchKind searchKind, SymbolFilter criteria);

src/Workspaces/Core/Portable/FindSymbols/SymbolFinder_FindLiteralReferences.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.Collections.Immutable;
-using System.Linq;
+using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.CodeAnalysis.FindSymbols.Finders;
 using Microsoft.CodeAnalysis.Internal.Log;
-using Microsoft.CodeAnalysis.Remote;
 
 namespace Microsoft.CodeAnalysis.FindSymbols
 {
@@ -14,6 +11,7 @@ public static partial class SymbolFinder
     {
         internal static async Task FindLiteralReferencesAsync(
            object value,
+           TypeCode typeCode,
            Solution solution,
            IStreamingFindLiteralReferencesProgress progress,
            CancellationToken cancellationToken)
@@ -21,7 +19,7 @@ public static partial class SymbolFinder
             using (Logger.LogBlock(FunctionId.FindReference, cancellationToken))
             {
                 var handled = await TryFindLiteralReferencesInServiceProcessAsync(
-                    value, solution, progress, cancellationToken).ConfigureAwait(false);
+                    value, typeCode, solution, progress, cancellationToken).ConfigureAwait(false);
                 if (handled)
                 {
                     return;
@@ -44,6 +42,7 @@ public static partial class SymbolFinder
 
         private static async Task<bool> TryFindLiteralReferencesInServiceProcessAsync(
             object value,
+            TypeCode typeCode,
             Solution solution,
             IStreamingFindLiteralReferencesProgress progress,
             CancellationToken cancellationToken)
@@ -63,7 +62,7 @@ public static partial class SymbolFinder
 
                 await session.InvokeAsync(
                     nameof(IRemoteSymbolFinder.FindLiteralReferencesAsync),
-                    value).ConfigureAwait(false);
+                    value, typeCode).ConfigureAwait(false);
 
                 return true;
             }

src/Workspaces/Remote/ServiceHub/Services/CodeAnalysisService_SymbolFinder.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.Immutable;
 using System.Linq;
 using System.Threading.Tasks;
@@ -35,13 +36,14 @@ public async Task FindReferencesAsync(SerializableSymbolAndProjectId symbolAndPr
                 progressCallback, documents, CancellationToken).ConfigureAwait(false);
         }
 
-        public async Task FindLiteralReferencesAsync(object value)
+        public async Task FindLiteralReferencesAsync(object value, TypeCode typeCode)
         {
+            var convertedType = System.Convert.ChangeType(value, typeCode);
             var solution = await GetSolutionAsync().ConfigureAwait(false);
 
             var progressCallback = new FindLiteralReferencesProgressCallback(this);
             await SymbolFinder.FindLiteralReferencesInCurrentProcessAsync(
-                value, solution, progressCallback, CancellationToken).ConfigureAwait(false);
+                convertedType, solution, progressCallback, CancellationToken).ConfigureAwait(false);
         }
 
         public async Task<ImmutableArray<SerializableSymbolAndProjectId>> FindAllDeclarationsWithNormalQueryAsync(