Another simple way to verify the version of .NET Compact Framework installed on your device (other than checking the registry as pointed) is to go to your device's Windows folder and launch an ...

If your business is not ready to update and install the latest version of .NET Framework on Windows system then this post shows how to block installation.

Now you need to make sure that you have the Windows version that is compatible with the .NET Framework. You will get the list here on Microsoft.

It seems with the advent of the handheld device age, there is more than one version of of .net 2. I had been trying to install Compact framework. Got the version for XP, and got 'er done!