Fix post cherry-pick

Author: davidwengier

src/Razor/src/Microsoft.VisualStudio.LanguageServerClient.Razor/RazorProjectInfoPublisher.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Threading.Tasks;

src/Razor/test/Microsoft.VisualStudio.LanguageServerClient.Razor.Test/RazorProjectInfoPublisherTest.cs

@@ -624,6 +624,7 @@ private class TestRazorProjectInfoPublisher : RazorProjectInfoPublisher
 
         private readonly bool _shouldSerialize;
         private readonly bool _useRealShouldSerialize;
+        private readonly bool _configurationFileExists;
 
         static TestRazorProjectInfoPublisher()
         {
@@ -636,17 +637,19 @@ public TestRazorProjectInfoPublisher(
             ProjectConfigurationFilePathStore projectStatePublishFilePathStore,
             Action<IProjectSnapshot, string> onSerializeToFile = null,
             bool shouldSerialize = true,
-            bool useRealShouldSerialize = false)
+            bool useRealShouldSerialize = false,
+            bool configurationFileExists = true)
             : base(s_lspEditorFeatureDetector.Object, projectStatePublishFilePathStore, TestRazorLogger.Instance)
         {
             _onSerializeToFile = onSerializeToFile ?? ((_1, _2) => throw new XunitException("SerializeToFile should not have been called."));
             _shouldSerialize = shouldSerialize;
             _useRealShouldSerialize = useRealShouldSerialize;
+            _configurationFileExists = configurationFileExists;
         }
 
         protected override bool FileExists(string file)
         {
-            return true;
+            return _configurationFileExists;
         }
 
         protected override void SerializeToFile(IProjectSnapshot projectSnapshot, string configurationFilePath) => _onSerializeToFile?.Invoke(projectSnapshot, configurationFilePath);