WinForm og terminering

Antag følgende kode:
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Threading;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using D3D = Microsoft.DirectX.Direct3D;

public class D3DTestForm : System.Windows.Forms.Form {
    private Device device;
    private System.ComponentModel.Container components = null;
    private bool wireframe = false;
    private float angle = 0f;
    private CustomVertex.PositionColored[] vertices;

    public D3DTestForm() {
        this.components = new System.ComponentModel.Container();
        this.Size = new System.Drawing.Size(500, 500);
        this.Text = "DirectX Test";
        this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque, true);
        Thread thread = new Thread(new ThreadStart(this.run));
        thread.Start();
    }

    public void InitializeDevice() {
        PresentParameters presentParams = new PresentParameters();
        presentParams.Windowed = true;
        presentParams.SwapEffect = SwapEffect.Discard;
        device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams);
    }

    private void CameraPositioning() {
        device.Transform.Projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Height, 1f, 50f);
        device.Transform.View = Matrix.LookAtLH(new Vector3(0, 0, -30), new Vector3(0, 0, 0), new Vector3(0, 1, 0));
        device.RenderState.Lighting = false;
        device.RenderState.CullMode = Cull.None;
    }

    private void VertexDeclaration() {
        vertices = new CustomVertex.PositionColored[3];
        vertices[0].Position = new Vector3(0f, 0f, 0f);
        vertices[0].Color = Color.Red.ToArgb();
        vertices[1].Position = new Vector3(10f, 0f, 0f);
        vertices[1].Color = Color.Green.ToArgb();
        vertices[2].Position = new Vector3(5f, 10f, 0f);
        vertices[2].Color = Color.Yellow.ToArgb();
    }

    protected override void OnPaint(System.Windows.Forms.PaintEventArgs e) {
        device.Clear(ClearFlags.Target, Color.DarkSlateBlue, 1.0f, 0);
        device.RenderState.FillMode = wireframe ? D3D.FillMode.WireFrame : D3D.FillMode.Solid;
        device.BeginScene();
        device.VertexFormat = CustomVertex.PositionColored.Format;
        device.Transform.World = Matrix.Translation(-5, -10 * 1 / 3, 0) * Matrix.RotationAxis(new Vector3(angle * 4, angle * 2, angle * 3), angle);
        device.DrawUserPrimitives(PrimitiveType.TriangleList, 1, vertices);
        device.EndScene();
        device.Present();
        this.Invalidate();
    }

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

    private void run() {
        while (true) {
            angle += 0.05f;
            Thread.Sleep(16);//average: 1000/16 = 62.5 FPS
        }
    }

    protected override void OnKeyDown(KeyEventArgs e) {
        switch (e.KeyCode) {
            case Keys.Escape:
                Application.Exit();
                break;
            case Keys.W:
                wireframe = !wireframe;
                break;
            default:
                base.OnKeyDown(e);
                break;
        }
    }

    static void Main() {
        using (D3DTestForm form = new D3DTestForm()) {
            form.InitializeDevice();
            form.CameraPositioning();
            form.VertexDeclaration();
            Application.Run(form);
        }
    }
}

Når jeg terminerer formen (f.eks. tryk på "kryds" eller ESC) så forsvinder formen men programmet kører fortsat videre - kan ses i Windows Task Manager.

Hvordan får jeg afsluttet programmet helt når formen lukkes.