Use

sn -k keyPair.snk

from the Visual Studio command prompt to create it.

>I'm trying to implement stepping into the MM classes during debug. I followed the instruction in the: Stepping through MM .NET Code in the Debugger help topic, but no good. So, i decided to build the framework, but i get the following error:
>Cryptographic failure while signing assembly 'C:\Program Files\Mere Mortals .NET Framework 2003\Mere Mortals Framework\obj\Debug\Mere Mortals Framework.dll' -- 'Error reading key file 'keyPair.snk' -- The system cannot find the file specified. '
>
>Mike