Icon Resource Error

I am working on a keygen (dont get the wrong idea, its for an encryption algorithm example from Microsoft, not a tool for illegally stealing software) and i am building it using the .NET Framework, and not VS.NET or any IDE. Below is the code to compile the application on the command line. When i compile, everything runs great. However when i run the exe i get an error(see below). If i got my code right, it should use the embeded resource App.ico as the icon for the form, or so i thought, but i get this error. Any help would be appreciated.

Code:

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csc /t:winexe /out:Keygen.exe /res:App.ico /r:Crypto.dll /win32icon:App.ico Keygen.cs AssemblyInfo.cs

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Code:

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this.Icon = new Icon(GetType(),"App.ico");

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http://www.animatedtoys.com/misc/keygen_error.gif