DataGridViewに列を動的に追加する方法

DataGridViewに列を動的に追加する方法
VB.NET

dgv1.AutoGenerateColumns = False
dgv1.DataSource = BindingSource1

Dim textColumn As New DataGridViewTextBoxColumn()
textColumn.DataPropertyName = "col1"
textColumn.Name = "col1"
textColumn.HeaderText = "col1"
dgv1.Columns.Add(textColumn)

C#

dgv1.AutoGenerateColumns = false;
dgv1.DataSource = BindingSource1;

DataGridViewTextBoxColumn textColumn = new DataGridViewTextBoxColumn();
textColumn.DataPropertyName = "col1";
textColumn.Name = "col1";
textColumn.HeaderText = "col1";
dgv1.Columns.Add(textColumn);