Please help doing c# homework

[stounE]

Please can u show me the way how to make three line in different directions using c# windows form with three buttons.I made it the code but lines are in same directions.Thnx

 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;

 namespace ThreeLines
 {
 public partial class Form1 : Form
 {
 public Form1()
 {
 InitializeComponent();
 }

 private void button1_Click(object sender, EventArgs e)
 {
 Pen lapsi;
 lapsi = new Pen(Color.Red);
 Graphics grafika = this.CreateGraphics();
 grafika.DrawLine(lapsi, 0, 0, 100, 100);

 }

 private void button2_Click(object sender, EventArgs e)
 {
 Pen pen;
 pen = new Pen(Color.Black);
 Graphics grafika2 = this.CreateGraphics();
 grafika2.DrawLine(pen, 200, 200, 300, 300);

 }

 private void button3_Click(object sender, EventArgs e)
 {
 Pen pencil;
 pencil = new Pen(Color.Blue);
 Graphics grafika3 = this.CreateGraphics();
 grafika3.DrawLine(pencil, 400, 400, 500, 500);

 }
 }
 }

[Arjay]

Change the values you are using. Instead of using 0,0,100,100, try 0,0, 35, 500 and see what happens. Don't be afraid to experiment.

[stounE]

Arjay. thank you it worked.I made it.