Simple MD5 hash

I made a simple MD5 hasher today, I needed to check some hashes so I thought this might be handy.

The code is extremely simple, so here it is:

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Security.Cryptography;
using System.Text;

namespace hasher
{
 /// 

 /// Summary description for Form1.
 /// 
 public class hash : System.Windows.Forms.Form
 {
  private System.Windows.Forms.TextBox txt_data;
  private System.Windows.Forms.Label lbl_hash;
  private System.Windows.Forms.GroupBox grp_hash;

  private MD5 md5;
  private UTF8Encoding ue;

  /// 

  /// Required designer variable.
  /// 
  private System.ComponentModel.Container components = null;

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

   md5 = new MD5CryptoServiceProvider();
   ue = new System.Text.UTF8Encoding();
  }

  /// 

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

  #region Windows Form Designer generated code
  /// 

  /// Required method for Designer support - do not modify
  /// the contents of this method with the code editor.
  /// 
  private void InitializeComponent()
  {
   this.txt_data = new System.Windows.Forms.TextBox();
   this.lbl_hash = new System.Windows.Forms.Label();
   this.grp_hash = new System.Windows.Forms.GroupBox();
   this.grp_hash.SuspendLayout();
   this.SuspendLayout();
   // 
   // txt_data
   // 
   this.txt_data.Location = new System.Drawing.Point(8, 8);
   this.txt_data.Multiline = true;
   this.txt_data.Name = "txt_data";
   this.txt_data.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
   this.txt_data.Size = new System.Drawing.Size(272, 112);
   this.txt_data.TabIndex = 0;
   this.txt_data.Text = "";
   this.txt_data.TextChanged += new System.EventHandler(this.txt_data_TextChanged);
   // 
   // lbl_hash
   // 
   this.lbl_hash.Location = new System.Drawing.Point(8, 16);
   this.lbl_hash.Name = "lbl_hash";
   this.lbl_hash.Size = new System.Drawing.Size(256, 23);
   this.lbl_hash.TabIndex = 1;
   // 
   // grp_hash
   // 
   this.grp_hash.Controls.Add(this.lbl_hash);
   this.grp_hash.Location = new System.Drawing.Point(8, 128);
   this.grp_hash.Name = "grp_hash";
   this.grp_hash.Size = new System.Drawing.Size(272, 40);
   this.grp_hash.TabIndex = 2;
   this.grp_hash.TabStop = false;
   this.grp_hash.Text = "MD5";
   // 
   // hash
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(292, 173);
   this.Controls.Add(this.grp_hash);
   this.Controls.Add(this.txt_data);
   this.MaximizeBox = false;
   this.MinimizeBox = false;
   this.Name = "hash";
   this.Text = "MD5 Hasher";
   this.grp_hash.ResumeLayout(false);
   this.ResumeLayout(false);

  }
  #endregion

  /// 

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

  private void txt_data_TextChanged(object sender, System.EventArgs e)
  {
   byte[] b = ue.GetBytes(txt_data.Text);
   lbl_hash.Text = Convert.ToBase64String(md5.ComputeHash(b));
  }
 }
}