Update src/VisualStudio/LiveShare/Impl/AbstractGoToDefinitionWithFindUsagesServiceHandler.cs

Co-authored-by: NJoey Robichaud <joseph.robichaud@microsoft.com>

src/VisualStudio/LiveShare/Impl/AbstractGoToDefinitionWithFindUsagesServiceHandler.cs

@@ -51,7 +51,7 @@ public async Task<object> HandleAsync(LSP.TextDocumentPositionParams request, Re
             var locations = await GetDefinitionsWithFindUsagesServiceAsync(document, position, cancellationToken).ConfigureAwait(false);
 
             // No definition found - see if we can get metadata as source but that's only applicable for C#\VB.
-            if ((locations.Count() == 0) && document.SupportsSemanticModel && this._metadataAsSourceService != null)
+            if ((locations.Length == 0) && document.SupportsSemanticModel && this._metadataAsSourceService != null)
             {
                 var symbol = await SymbolFinder.FindSymbolAtPositionAsync(document, position, cancellationToken).ConfigureAwait(false);
                 if (symbol?.Locations.FirstOrDefault().IsInMetadata == true)