If you want to know what an assembly does, you can use Reflector to refactor the assembly and check the codes. If you want to know why binding assembly failed, you can use Assembly Binding Log Viewer to check it. Also you should set HKLM\Software\Microsoft\Fusion\ForceLog registry value to 1 . When the assembly is used, you want to know what the assembly uses, you can use Process Explorer ....(read more)