Cannot Convert Type

Cannot convert type ‘Microsoft.SharePoint.WebControls.DelegateControl’ to ‘System.Web.UI.IAttributeAccessor’

This error mostly happens when you trying to edit the master page of site in SharePoint.

To fix it

• Open the master page in notepad
• You’ll see a big chunk of html code that is commented out.
• Mostly this will be at the end of the page after </html> tag.
• Delete that chunk of data. The master page will work properly again.

Now check your page in browser which is error free.