Two object interact

Question

What I am trying to do is if shift and one of the arrow keys pressed( simultaneously )then two object can interact with each other else not!

the two objects named ship and dock, so when shift + up arrow key pressed then ship can enter the dock.

My code


namespace Learning_how_to_Paint
{
  public partial class Form1 : Form
  {
  private Rectangle ship;
  private Rectangle dock;

  private bool isDragging;

  public Form1()
  {
  InitializeComponent();

  ship = new Rectangle(new Point(10, 10), new Size(10, 10));

  dock = new Rectangle(new Point(30, 30), new Size(40, 40));
  isDragging = false;

  }

  private void Form1_Paint(object sender, PaintEventArgs e)
  {
  Graphics g = e.Graphics;
  g.FillEllipse(Brushes.RoyalBlue, ship);

  if (ship.IntersectsWith(dock))
  {
  g.FillRectangle(Brushes.Yellow, dock);
  }
  else
  {
  g.FillRectangle(Brushes.Black, dock);
  }
  }

  private void Form1_MouseUp(object sender, MouseEventArgs e)
  {
  isDragging = false;
  ship.Location = e.Location;

  this.Refresh();
  }

  private void Form1_MouseDown(object sender, MouseEventArgs e)
  {
  isDragging = true;
  }

  private void Form1_MouseMove(object sender, MouseEventArgs e)
  {
  if (isDragging)
  {
  int formWidth = this.ClientRectangle.Width;
  int formHeight = this.ClientRectangle.Height;

  isDragging = !(e.X + ship.Width > formHeight || e.X < 0 || e.Y + ship.Height > formHeight || e.Y < 0);

  if (isDragging)
  {
  ship.Location = e.Location;
  this.Refresh();
  }
  }
  }

  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
  if ((e.Shift) && (e.KeyCode == Keys.Up))
  {
  if(ship.IntersectsWith(dock))
  {
 
  MessageBox.Show("Interact");
  }

  else
  {
  MessageBox.Show("You cant enter the object, shift key or arrow key must be pressed simultaneously");
  }
  }

  //if ((e.Shift) && (e.KeyCode == Keys.Down))
  //{
  //  if (ship.IntersectsWith(dock))
  //  {
  //  MessageBox.Show("Interact");
  //  }
  //  else
  //  {
  //  MessageBox.Show("You cant enter the object, shift key or arrow key must be pressed simultaneously");
  //  }
  //}
  //if ((e.Shift) && (e.KeyCode == Keys.Left))
  //{
  //  if (ship.IntersectsWith(dock))
  //  {
  //  MessageBox.Show("Interact");
  //  }
  //  else
  //  {
  //  MessageBox.Show("You cant enter the object, shift key or arrow key must be pressed simultaneously");
  //  }
  //}
  //if ((e.Shift) && (e.KeyCode == Keys.Right))
  //{
  //  if (ship.IntersectsWith(dock))
  //  {
  //  MessageBox.Show("Interact");
  //  }
  //  else
  //  {
  //  MessageBox.Show("You cant enter the object, shift key or arrow key must be pressed simultaneously");
  //  }
  //}

  // move object up
  if (e.KeyCode == Keys.Up)
  {
  ship.Y = ship.Y - 5;
  this.Refresh();
  }
  //move object down
  else if (e.KeyCode == Keys.Down)
  {
  ship.Y = ship.Y + 5;
  this.Refresh();
  }
  // move oboject left
  else if (e.KeyCode == Keys.Left)
  {
  ship.X = ship.X - 5;
  this.Refresh();
  }
  //move object right
  else if (e.KeyCode == Keys.Right)
  {
  ship.X = ship.X + 5;
  this.Refresh();
  }