how do you do a collison in C# no XNA plugin?

bool move = true;


  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
      int x = pictureBox1.Location.X;
      int y = pictureBox1.Location.Y;

      if (e.KeyCode == Keys.W) y -= 5;
      else if (e.KeyCode == Keys.S) y += 5;
      else if (e.KeyCode == Keys.A) x -= 5;
      else if (e.KeyCode == Keys.D) x += 5;

      {
          pictureBox1.Location = new Point(x, y);
      }

          if (move == false)
          {


              pictureBox1.Location = new Point(0, 0);



          }
      }





  private void Form1_Load(object sender, EventArgs e)
  {
      timer1.Interval = 50;

      timer1.Start();

  }

  private void timer1_Tick(object sender, EventArgs e)
  {



      if (pictureBox1.Bounds.IntersectsWith(pictureBox2.Bounds))
      {
          pictureBox1.BackColor = Color.Black;

          move = false;

      }
      else
      {
          pictureBox1.BackColor = Color.Blue;


      }
  }