C# 3.5 datagridview column header click does not sorts

I have winform there开发者_JS百科 is datagridview control when i click on column header it does not sorts. Can anyone advice me whats wrong?

Each column has "SortMode" property in datagridview control. SortMode Values : Automatic, NotSortable, Programmatic You could check SortMode property.

 private void dataGridView1_ColumnAdded(object sender, DataGridViewColumnEventArgs e)
        {
            e.Column.SortMode = DataGridViewColumnSortMode.NotSortable;
        }