DrawPie

DrawPie(Pen, RectangleF, float, float)

public void DrawPie(Pen pen, RectangleF rect, float startAngle, float sweepAngle)

也可以看看


DrawPie(Pen, float, float, float, float, float, float)

public void DrawPie(Pen pen, float x, float y, float width, float height, float startAngle, 
    float sweepAngle)

也可以看看