Merge pull request #1663 from mrlacey/patch-1

fix incorrect language annotation

Author: gewarren

docs/vs-2015/extensibility/creating-an-options-page.md

@@ -110,7 +110,7 @@ This walkthrough creates a simple Tools/Options page that uses a property grid t
 
 2.  Add the following using statement.  
 
-    ```vb  
+    ```csharp  
     using System.Windows.Forms;  
     ```