[RESOLVED] Change datagridview column type to checkbox (Not add)

[nikel]

Hello, I'm tying to change my dgv's column type to checkbox. I tried this:

programs_dgv.Columns[1] = new DataGridViewCheckBoxColumn();
programs_dgv.Columns[1].HeaderText = "Seç";
programs_dgv.Columns[1].TrueValue = 1;
programs_dgv.Columns[1].FalseValue = 2;

However the syntax is invalid. How can I fix this?