this.button1 = new System.Windows.Forms.Button();
        this.textBox1 = new System.Windows.Forms.TextBox();
        this.SuspendLayout();
    //
    // button1
    //

    this.button1.Location = new System.Drawing.Point(8, 16);
    this.button1.Name = button1;
    this.button1.Size = new System.Drawing.Size(80, 24);
    this.button1.TabIndex = 0;
    this.button1.Text = button1;

    //
    // textBox1
    //
    this.textBox1.Location = new System.Drawing.Point(112, 16);
    this.textBox1.Name = textBox1;
    this.textBox1.Size = new System.Drawing.Size(160, 20);
    this.textBox1.TabIndex = 1;
    this.textBox1.Text = textBox1;
    //
    // Form1
    //

    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 273);
    this.Controls.AddRange(new System.Windows.Forms.Control[] {
    this.textBox1,
    this.button1});
    this.Name = Form1;
    this.Text = Form1;
    this.ResumeLayout(false);

    }
    #endregion

    [STAThread]
    static void Main()
    {
        Application.Run(new SimpleForm());
    }
}
十六、运行时显示自己定义的图标：
//load icon and set to form
System.Drawing.Icon ico = new System.Drawing.Icon(@c:\temp\app.ico);
this.Icon = ico;
十七、添加组件到ListBox中：
private void Form1_Load(object sender, System.EventArgs e)
{
    string str = First item;
    int i = 23;
    float flt = 34.98f;
    listBox1.Items.Add(str);
    listBox1.Items.Add(i.ToString());
    listBox1.Items.Add(flt.ToString());
    listBox1.Items.Add(Last Item in the List Box);
}

网络方面的：
十八、取得IP地址：
using System;
using System.Net;

class GetIP
{
     public static void Main()
     {
         IPHostEntry ipEntry = Dns.GetHostByName (localhost);
         IPAddress [] IpAddr = ipEntry.AddressList;
         for (int i = 0; i < IpAddr.Length; i++)
         {
             Console.WriteLine (IP Address {0}: {1} , i, IpAddr.ToString ());
         }
    }
}
十九、取得机器名称：
using System;
using System.Net;