GDI+方面的：
二十二、GDI+入门介绍：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class Form1 : System.Windows.Forms.Form
{
    private System.ComponentModel.Container components = null;

    public Form1()
    {
        InitializeComponent();
    }

    protected override void Dispose( bool disposing )
    {
        if( disposing )
        {
            if (components != null)
            {
                components.Dispose();
            }
        }
        base.Dispose( disposing );
    }

    #region Windows Form Designer generated code
    private void InitializeComponent()
    {
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(292, 273);
        this.Name = Form1;
        this.Text = Form1;
        this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
    #endregion

    [STAThread]
    static void Main()
    {
        Application.Run(new Form1());
    }

    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
        Graphics g=e.Graphics;
        g.DrawLine(new Pen(Color.Blue),10,10,210,110);
        g.DrawRectangle(new Pen(Color.Red),10,10,200,100);
        g.DrawEllipse(new Pen(Color.Yellow),10,150,200,100);
    }
}

XML方面的：
二十三、读取XML文件：
using System;
using System.Xml; 

class TestReadXML
{
    public static void Main()
    {
       
        XmlTextReader reader  = new XmlTextReader(C:\\test.xml);
        reader.Read();
       
        while (reader.Read())
        {           
            reader.MoveToElement();
            Console.WriteLine(XmlTextReader Properties Test);
            Console.WriteLine(===================);