Update Comments

src/DynamoCoreWpf/ViewModels/PackageManager/PackageManagerClientViewModel.cs

@@ -1010,7 +1010,7 @@ internal virtual void InstallPackage(PackageDownloadHandle packageDownloadHandle
                         }
                     }
                     SetPackageState(packageDownloadHandle, installPath);
-                    // Dispose Index writer to avoid file lock
+                    // Dispose Index writer to avoid file lock after new package is installed
                     Search.LuceneSearch.LuceneUtilityNodeSearch.DisposeWriter();
                     Analytics.TrackEvent(Actions.Installed, Categories.PackageManagerOperations, $"{packageDownloadHandle?.Name}");
                 }

src/DynamoCoreWpf/ViewModels/PackageManager/PackagePathViewModel.cs

@@ -266,7 +266,7 @@ private void CommitChanges(object param)
                 packageLoader.LoadNewCustomNodesAndPackages(newPaths, customNodeManager);
             }
             packagePathsEnabled.Clear();
-            // Dispose Index writer to avoid file lock
+            // Dispose node Index writer to avoid file lock after new package path applied and packages loaded.
             Search.LuceneSearch.LuceneUtilityNodeSearch.DisposeWriter();
         }
 

src/DynamoUtilities/PathHelper.cs

@@ -37,6 +37,8 @@ public static Exception CreateFolderIfNotExist(string folderPath)
         {
             try
             {
+                // Do not even try when folder path is null or empty.
+                // This usually happens when system folder dialog is initialized with empty path
                 if (string.IsNullOrEmpty(folderPath)) return null;
                 // When network path is access denied, the Directory.Exits however still 
                 // return true.