for each subdirectory, set attribute to normal so it can be deleted without access denied error and add error handling

Author: Anam Navied

src/code/Utils.cs

@@ -1658,6 +1658,16 @@ public static void DeleteDirectoryWithRestore(string dirPath)
             }
         }
 
+        private static void SetAttributesHelper(DirectoryInfo directory)
+        {
+            foreach (var subDirectory in directory.GetDirectories())
+            {
+                subDirectory.Attributes = FileAttributes.Normal;
+                SetAttributesHelper(subDirectory);
+            }
+
+            directory.Attributes = FileAttributes.Normal;
+        }
         /// <Summary>
         /// Deletes a directory and its contents
         /// This is a workaround for .NET Directory.Delete(), which can fail with WindowsPowerShell
@@ -1672,21 +1682,25 @@ public static void DeleteDirectory(string dirPath)
             }
 
             // Remove read only file attributes first
-            foreach (var dirFilePath in Directory.GetFiles(dirPath,"*",SearchOption.AllDirectories))
+            foreach (var dirFilePath in Directory.GetFiles(dirPath, "*", SearchOption.AllDirectories))
             {
                 if (File.GetAttributes(dirFilePath).HasFlag(FileAttributes.ReadOnly))
                 {
                     File.SetAttributes(dirFilePath, File.GetAttributes(dirFilePath) & ~FileAttributes.ReadOnly);
                 }
             }
+
+            DirectoryInfo rootDir = new DirectoryInfo(dirPath);
+            SetAttributesHelper(rootDir);
+
             // Delete directory recursive, try multiple times before throwing ( #1662 )
             int maxAttempts = 5;
             int msDelay = 5;
             for (int attempt = 1; attempt <= maxAttempts; ++attempt)
             {
                 try
                 {
-                    Directory.Delete(dirPath,true);
+                    Directory.Delete(dirPath, true);
                     return;
                 }
                 catch (Exception ex)
@@ -1695,6 +1709,10 @@ public static void DeleteDirectory(string dirPath)
                     {
                         Thread.Sleep(msDelay);
                     }
+                    else if (ex is System.IO.IOException)
+                    {
+                        throw new Exception(string.Format("Access denied to path while deleting path {0}", dirPath), ex);
+                    }
                     else
                     {
                         throw;