Make sure that the class defined in this code file matches the 'inherits' attribute, and that it ext

[murl]

I want to create a web user control with a base class of 'GridView' so
I can wrap the needed methods to make rows clickable. However when
building the project I get the following message:

"Make sure that the class defined in this code file matches the
'inherits' attribute, and that it extends the correct base class (e.g.
Page or UserControl)."

Markup:
<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="MerlinGridView.ascx.cs" Inherits="MerlinGridView" %>

CodeBehind:
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class MerlinGridView : GridView
{

}

If I change the base type of this control to be 'UserControl', the
project builds fine. Any ideas?