title: Pin this program to taskbar option missing in my C# application
body: <p>All programs I have tried so far in Windows 7 have a 'Pin this program to taskbar' item when right-clicking them in the task bar.
  I have a C# program that only shows 'Close Window' and nothing else. It is build with C# 2010 Express, and targets .NET 3.5 framework.</p>
  
  <p>I can't find any reason why no other options show up or any properties I could change.
  Does anyone know what property could affect this option?</p>