private void InitializeMyGroupBox()
{
    // Create and initialize a GroupBox and a Button control.
    GroupBox groupBox1 = new GroupBox();
    Button button1 = new Button();
    button1.Location = new Point(20,10);

    // Set the FlatStyle of the GroupBox.
    groupBox1.FlatStyle = FlatStyle.Flat;

    // Add the Button to the GroupBox.
    groupBox1.Controls.Add(button1);

    // Add the GroupBox to the Form.
    Controls.Add(groupBox1);

    // Create and initialize a GroupBox and a Button control.
    GroupBox groupBox2 = new GroupBox();
    Button button2 = new Button();
    button2.Location = new Point(20, 10);
    groupBox2.Location = new Point(0, 120);

    // Set the FlatStyle of the GroupBox.
    groupBox2.FlatStyle = FlatStyle.Standard;

    // Add the Button to the GroupBox.
    groupBox2.Controls.Add(button2);

    // Add the GroupBox to the Form.
    Controls.Add(groupBox2);
}