#19453: Correcting implementation of AzureFileSystem.FolderExists

Work Item: 19453

--HG--
branch : 1.x

src/Orchard.Azure/AzureFileSystem.cs

@@ -103,7 +103,7 @@ namespace Orchard.Azure {
 
         public bool FolderExists(string path) {
             using (new HttpContextWeaver()) {
-                return Container.BlobExists(String.Concat(_root, path));
+                return Container.DirectoryExists(String.Concat(_root, path));
             }
         }