匹配委托“system.eventhandler”没有重载

由于我对 C# 还很陌生，所以我很难理解下面的代码。当我单击“knop”按钮时，必须执行“klik”方法。该方法必须在表单上绘制由“DrawMandel”生成的位图“b”。但我不断收到错误“匹配委托‘system.eventhandler’没有过载”。

using System;
using System.Windows.Forms;
using System.Drawing;

class Mandelbrot : Form 
{
    public Bitmap b;
    public Mandelbrot() 
    {
        Button knop;
        knop = new Button();        
        knop.Location = new Point(370, 15);        
        knop.Size = new Size(50, 30);
        knop.Text = "OK";        

        this.Text = "Mandelbrot 1.0";
        this.ClientSize = new Size(800, 800);
        knop.Click += this.klik;
        this.Controls.Add(knop);        


    }
    public void klik(PaintEventArgs pea, EventArgs e) {
        Bitmap c = this.DrawMandel();
        Graphics gr = pea.Graphics;
        gr.DrawImage(b, 150, 200);
    }
    public Bitmap DrawMandel()
    {
        //function that creates the bitmap
        return b;
    }
    static void Main() {
        Application.Run(new Mandelbrot());
    }

}

你需要改变public void klik(PaintEventArgs pea, EventArgs e) to public void klik(object sender, System.EventArgs e)因为没有Click带参数的事件处理程序PaintEventArgs pea, EventArgs e.