Assembly Comparison Tool (WinChurn)

I have found a great tool on the GotDotNet user samples website

WinChurn allows you to compare two versions of the same managed assembly. This is extremely helpful when tracking changes in your assembly. The tool comes with a help system, as well as some examples to get you started. Optionally, the tool allows you to generate a policy file, however caution is urged when using this feature. While the tool is extremely robust and accurate at detecting public API changes, it cannot detect internal changes. The tool uses Reflection to generate the results.