using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
 
namespace WindowsApplication17
{
	/// <summary>
	/// Zusammenfassung für Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		/// <summary>
		/// Erforderliche Designervariable.
		/// </summary>
		private System.ComponentModel.Container components = null;
 
		public Form1()
		{
			//
			// Erforderlich für die Windows Form-Designerunterstützung
			//
			InitializeComponent();
 
			//
			// TODO: Fügen Sie den Konstruktorcode nach dem Aufruf von _
  InitializeComponent hinzu
			//
		}
 
		/// <summary>
		/// Die verwendeten Ressourcen bereinigen.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}
 
		#region Vom Windows Form-Designer generierter Code
 
		#endregion
 
		/// <summary>
		/// Der Haupteinstiegspunkt für die Anwendung.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}
 
		private void Form1_Load(object sender, System.EventArgs e){
			this.KeyPreview = true;
		}
 
		private System.Threading.Thread thread = null;
		private SomeClass someClass			   = null;
 
		private void button1_Click(object sender, System.EventArgs e){
			AbortThread();
			someClass = new SomeClass();
			thread = new System.Threading.Thread(new System.Threading.ThreadStart( _
  someClass.someMethode));
			thread.Start();
		}
 
		private void AbortThread()
		{
			if(someClass != null)
			{
				someClass.DoAbort = true;
			}
		}
 
		private void button2_Click(object sender, System.EventArgs e){
			AbortThread();
		}
 
		private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs _
  e){
 
			if ((e.KeyCode == System.Windows.Forms.Keys.Escape))
			{
				AbortThread();
			}
		}
	}
}
 
public class SomeClass
{
	private bool doAbort = false;
 
	public bool DoAbort
	{
		get{
			return this.doAbort;
		}
 
		set{
			this.doAbort = value;
		}
	}
 
	public void someMethode()
	{
		while (!this.doAbort)
		{
			System.Diagnostics.Debug.WriteLine (DateTime.Now.ToString());
			System.Threading.Thread.Sleep (100);
			System.Windows.Forms.Application.DoEvents();
		}
		System.Diagnostics.Debug.WriteLine ("Abort!");
	}
}