Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation. Specify the ServiceNotification or DefaultDesktopOnly style to display a...

protected void DeleteRecord(object sender, GridViewDeleteEventArgs e)
   {
       if (!IsPageRefresh)
       {
           string id = gridRegistrationTableDetails.Rows[e.RowIndex].Cells[2].Text;
           if (MessageBox.Show("Are you sure to delete the record?", "Delete Employee Record.!", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
           {
               deleterecordMethod(id);
               BindData();
           }
       }
   }