I\'m getting this error when I run my app (not at compile time):
Could not load file or assembly \'Castle.Windsor, Version=2.1.0.0, Culture=neutral,
Have you looked at the assembly binding log viewer (Fuslogvw.exe)?
This should provide all the information needed.
See on MSDN.
You could use the Fuslogvw.exe utility which will provide you more information on the calling assembly. Scott Hansleman also blogged about it.
FusionLog tool is best tool for things like that, but sometimes will only point to your code. Try turning up the verbosity for MSBuild and you might be able to track it down to where the compilation is at when it fails.