This is no longer maintained here. Go here for the latest version: https://github.com/JasonBock/AssemblyVerifier
This is a simple wrapper around peverify. The nice thing about this assembly is that you can verify dynamic assemblies (generated via Reflection.Emit) directly in code so you'll know right away if something's wrong with your emitted code.
You can get the latest release via NuGet - search for "AssemblyVerifier".