Visual Basic.NET - Datagrid no editable columna

DataGridView1.Columns(2).ReadOnly = True

Private Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click

        DataGridView1.Columns(2).ReadOnly = False   ' Eliminar ReadOnly

' trabajar con cledas de la columna, aqui cambio el valor de la celda que tiene el focus

        DataGridView1.Item(2, DataGridView1.CurrentCellAddress.Y).Value = "AZER"

        DataGridView1.Columns(2).ReadOnly = True   ' Reponer ReadOnly