vb.net compile error 'abc' is ambiguous in the namespace 'xyz'

Question

I have a VB.Net solution that another developer created and I\'m trying to compile it on our build machine (it compiles on their machine) but with one of the projects I get

Answer 1

I was facing same issue. I upgraded my application from vb6 to vb.net and when i change the build configuration from DEBUG to RELEASE then i got AMBIGUOUS errors. I found dulicate references folder in solution Explorer. I removed those duplicate referecnces and Build sucessfully. I Hope it may help others.