private void growStyleNoneBtn_CheckedChanged(
    System.Object sender, 
    System.EventArgs e)
{
    this.tlpGrowStyle = TableLayoutPanelGrowStyle.FixedSize;
}

private void growStyleAddRowBtn_CheckedChanged(
    System.Object sender, 
    System.EventArgs e)
{
    this.tlpGrowStyle = TableLayoutPanelGrowStyle.AddRows;
}

private void growStyleAddColumnBtn_CheckedChanged(
    System.Object sender, 
    System.EventArgs e)
{
    this.tlpGrowStyle = TableLayoutPanelGrowStyle.AddColumns;
}

private void testGrowStyleBtn_Click(
    System.Object sender, 
    System.EventArgs e)
{
    this.TableLayoutPanel1.GrowStyle = this.tlpGrowStyle;

    try
    {
        this.TableLayoutPanel1.Controls.Add(new Button());
    }
    catch(ArgumentException ex)
    {
        Trace.WriteLine(ex.Message);
    }
}