How about we don't waste our time providing a solution for a problem you don't have? Just tell us which it is. Click on it and look at the type specified in the combo box at the top of the Properties window, or mouse over its name in code and read the tool tip. If you don't know then it's almost certainly a DataGridView as the DataGrid is not available in the Toolbox by default, so you'd have had to add it specifically.