Sure, this will throw the exception:

HttpWebRequest req =
HttpWebRequest.Create(@"http://-eeayr4mwvtw998.usercash.com/") as
HttpWebRequest;

I ought to mention, I'm using .NET 1.1. Maybe it was something fixed in a
later version...

Sorry, you asked for short but complete. Here's complete  (though I think
the previous post is plenty to demonstrate how easy it is to produce).

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Text;

namespace UserCashTest
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
       private System.Windows.Forms.Button button1;
       private System.Windows.Forms.TextBox textBox1;
 /// <summary>
 /// Required designer variable.
 /// </summary>
 private System.ComponentModel.Container components = null;

 public Form1()
 {
  //
  // Required for Windows Form Designer support
  //
  InitializeComponent();

  //
  // TODO: Add any constructor code after InitializeComponent call
  //
 }

 /// <summary>
 /// Clean up any resources being used.
 /// </summary>
 protected override void Dispose( bool disposing )
 {
  if( disposing )
  {
   if (components != null)
   {
    components.Dispose();
   }
  }
  base.Dispose( disposing );
 }

 #region Windows Form Designer generated code
 /// <summary>
 /// Required method for Designer support - do not modify
 /// the contents of this method with the code editor.
 /// </summary>
 private void InitializeComponent()
 {
           this.button1 = new System.Windows.Forms.Button();
           this.textBox1 = new System.Windows.Forms.TextBox();
           this.SuspendLayout();
           //
           // button1
           //
           this.button1.Location = new System.Drawing.Point(88, 16);
           this.button1.Name = "button1";
           this.button1.TabIndex = 0;
           this.button1.Text = "button1";
           this.button1.Click += new
System.EventHandler(this.button1_Click);
           //
           // textBox1
           //
           this.textBox1.Anchor =
((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top

               | System.Windows.Forms.AnchorStyles.Left)
               | System.Windows.Forms.AnchorStyles.Right)));
           this.textBox1.Location = new System.Drawing.Point(8, 64);
           this.textBox1.Multiline = true;
           this.textBox1.Name = "textBox1";
           this.textBox1.Size = new System.Drawing.Size(280, 200);
           this.textBox1.TabIndex = 1;
           this.textBox1.Text = "";
           //
           // Form1
           //
           this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
           this.ClientSize = new System.Drawing.Size(292, 273);
           this.Controls.Add(this.textBox1);
           this.Controls.Add(this.button1);
           this.Name = "Form1";
           this.Text = "Form1";
           this.ResumeLayout(false);

       }
 #endregion

 /// <summary>
 /// The main entry point for the application.
 /// </summary>
 [STAThread]
 static void Main()
 {
  Application.Run(new Form1());
 }

       private void button1_Click(object sender, System.EventArgs e)
       {
           HttpWebRequest req =
HttpWebRequest.Create(@"http://-eeayr4mwvtw998.usercash.com/") as
HttpWebRequest;
           HttpWebResponse resp = req.GetResponse() as HttpWebResponse;
           string len = resp.Headers["Content-Length"];
           int dataLen = Convert.ToInt32(len);
           byte[] data = new byte[dataLen];
           resp.GetResponseStream().Read(data, 0, dataLen);
           resp.Close();

           string dataStr = ASCIIEncoding.ASCII.GetString(data);
           textBox1.Text = dataStr;

       }
}
}