Using the below object StaffOut and binding it to a winGrid, I can update and delete winGrid rows but I can’t add rows. This is the error I'm receiving:

Additional information: Unable to add a new row. Underlying DataSource does not support adding new rows.

List<BEL_Employee> StaffOut = new List<BEL_Employee>();

           StaffOut = DAL_Employee_Get.GetStaff();   

         ugPTOStaff.DataSource = null;

           //ugPTOStaff.DataSource = bELEmployeeBindingSource;

           ugPTOStaff.DataSource = StaffOut;

            ugPTOStaff.DataBind();

After reading the online documentation I think what I am doing should work but apparently I’m missing something.

Any help you can provide would be appreciated.

Thank you.