Ye Aulde Application Starter

using System;
using System.Threading;
using System.Reflection;
using System.Windows.Forms;

namespace AppStart {

	public class MainForm : System.Windows.Forms.Form {

		#region Windows Form Designer generated code

		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Label label1;

		private void InitializeComponent() {
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(MainForm));
			this.button1 = new System.Windows.Forms.Button();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label1 = new System.Windows.Forms.Label();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.button1.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.button1.Location = new System.Drawing.Point(188, 240);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(164, 32);
			this.button1.TabIndex = 0;
			this.button1.Text = "Simulate unexpected error";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.groupBox1.Location = new System.Drawing.Point(12, 12);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(516, 212);
			this.groupBox1.TabIndex = 2;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "GroupBox";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 28);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(160, 20);
			this.label1.TabIndex = 2;
			this.label1.Text = "Label";
			// 
			// MainForm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(540, 278);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.button1);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Name = "MainForm";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "Application Starter";
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}

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

		#endregion

		[STAThread]
		static void Main() {
			// Enable XP themed controls
			Application.EnableVisualStyles();
			Application.DoEvents();
			// ensure one instance running
			if(!MainForm.InstanceExists) {
#if DEBUG
				Application.Run(new MainForm());
#else
				// enable unhandled exceptions trapping for release version
				try {
					Application.Run(new MainForm());
				}
				catch(Exception ex) {
					new ExceptionDialog(ex).ShowDialog();
				}
#endif
			}
		}

		static Mutex mutex;
		static string AppGuid = "4B8CB7C2-1BD3-4db4-AFF0-A398466C5EEF";
		static bool InstanceExists {
			get {
				bool notExists;
				mutex = new Mutex( false, "Local\\" + AppGuid + " - one instance runner.", out notExists ); 
				return !notExists;
			}
		} 

		public MainForm() {
			Splash.Show(this);
			Thread.Sleep(2000);
			InitializeComponent();
		}

		private void button1_Click(object sender, System.EventArgs e) {
			// cause an exception to happen
			int x = 0;
			int y = 0 / x;
		}

	}

}