title: start single instance project
body: <p>I want that my application run only single instance, I used for that the code under pasted under, but It gives me an error :</p>
  
  <pre><code>Error   1   'MYAPP.App' does not implement interface member 
              'Microsoft.Shell.ISingleInstanceApp.SignalExternalCommandLineArgs
               (System.Collections.Generic.IList&lt;string&gt;)'
              C:\Users\moataz\Desktop\MYAPP 26-06-2013\MYAPP\App.xaml.cs
  </code></pre>
  
  <p><a href="http://www.codeproject.com/Articles/84270/WPF-Single-Instance-Application" rel="nofollow">http://www.codeproject.com/Articles/84270/WPF-Single-Instance-Application</a></p>