I'm attaching a small box to the bottom of the larger shape and I want to create the smaller shape to make it look like an upside down house. How do I modify the properties to do that?

Box textBox = flowChart1.CreateBox(10, 10, 50, 30);
textBox.PolyTextLayout = true;
textBox.EnableStyledText = true;
textBox.Text = "Pairs Model 0625";
textBox.Selected = false;
textBox.Style = BoxStyle.RoundedRectangle;


Box textBox1 = flowChart1.CreateBox(12, 40, 10, 10);
textBox1.PolyTextLayout = true;
textBox1.EnableStyledText = true;
textBox1.Text = "A";
textBox1.Selected = false;
textBox1.AttachTo(textBox, AttachToNode.BottomLeft);
textBox1.Locked = true;
textBox1.Brush = textBox1.Brush;