Are you trying to run the code from a network share or pocket flash drive? By default, the .NET runtime will only allow code to run from the local hard drives.

The post above is true for all practical purposes, but I just wanted to point out a distinction here. You can run .net code across the network (ie. from a share), but only if it does not try to do anything that needs security privelages.

The typical offender here is reading and writing a file.

Here are a few workarounds.

* You can change the caspool to help with this problem (give execute permission to that assembly). There is also a machine level configuration for this. You'll need to be using signed assemblies.

* You can create a client server relationship to help with this problem.

* Use a little bit of native code as a wrapper.

I'm sure that there is a better solution out there, but as yet I have not found it. If you find it, please post it.