DataGridview in User Control Event issue in C#.net

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C#3.0

C#

Dear All,
I am working on user Control. In that user COntrol , I want to add Some New events for access from the form(Parent form).
I added New Events for CellClicked and CellDoubleClick.
Here the Code,

//Declaration 
 public delegate void CellClickedEventHandler(object sender, DataGridViewCellEventArgs e);
 public event CellClickedEventHandler CellClicked;

 public delegate void CellDoubleClickedEventHandler(object sender, DataGridViewCellEventArgs e);
 public event CellDoubleClickedEventHandler CellDoubleClicked;


//Functions
  private void CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (CellClicked != null)
                CellClicked(this, e);
        } 

  private void CellDouClick(object sender, DataGridViewCellEventArgs e)
        {
            if (CellDoubleClicked != null)
                CellDoubleClicked(this, e);
        }

On the Constructor:

<datagridview name="">.CellClick += new DataGridViewCellEventHandler(CellClicked);
<datagridview name="">.CellDoubleClick += new DataGridViewCellEventHandler(CellDoubleClicked);

Rebuild the application. no error displayed on the Error List

Drag the User Control(Datagridview), I am getting following error.

Quote:

Delegate to an instance method cannot have null 'this'

How can i solve this?