用C#绘制正弦曲线，要用到Form1_Resize，Form1_Paint两个方法，C#源代码 int x1, x2; double y1, y2; double a; Pen myPen = new Pen(Color.Blue, 3); x1 = x2 = 0; y1 = y2 = this.ClientSize.Height / 2; for (x2 = 0; x2 < this.ClientSize.Width; x2++) { a = 2 * Math.PI * x2 / th