title: Shadow to windows form
body: <p>I am working in C# Windows Forms Application<br>
  I want to make shadow of my form, so I have taken a image having shadow and set it as Form's Background image and also set <code>TransparentKey</code> to Form's BackColor i.e. <code>Control Color</code>, so that it will transparent the area which contains Control color and <code>FormBorderStyle</code> to <code>None</code>.  </p>
  
  <p>My problem is that I am not getting the shadow transparent, it is of Control Color.  </p>
  
  <p><strong>Updated:</strong> I also want to change shape of my form</p>
  
  <p><img src="https://i.stack.imgur.com/69237.png" alt="Form Image"></p>