图形错误

Question

I have a bug with this code but it runs and I don't see where.

System.Drawing.Graphics graphics = this.CreateGraphics();
System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(100, 100, 200);
graphics.DrawEllipse(System.Drawing.Pens.Black, rectangle);
graphics.DrawRectangle(System.Drawing.Pens.Red, rectangle);

Answer 1

Check line 2 of your code. You only having 3 dimensions instead of having four.

System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(100, 100, 200, xyz);

Answer 2

You need at least 2 points (4 coordinates) to draw a rectangle, maybe you wanted to do

System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(100, 100, 200, x);

where x is the fourth coordinate (which you have to add)?