How to fix “No way to resolve conflict between” error?

Question

Recently added log4net.dll to our data object. Our data object builds perfectly but when you try to build anything that references our data object you get the following error: <

Answer 1

We found out that crystal runtime was definitely the problem. If we uninstall log4net at %windir%\assembly that crystal runtime installed then the warning message goes away. What's weird is that if I install log4net 1.2.10 from log4net's site into the GAC then the warning message doesn't reappear. If anyone can explain that then please add to this thread. Crystal signed log4net with their own strong name key (the public key token is different).

The key to fixing the log4net problem is that log4net is a open source project. Which means we can simply build the dll from source with a different name. Haven't tried it out yet but that should fix the problem. We'll have the extra step of building from source every time we want to update log4net but considering how much we are going to update the dll it isn't a big deal.