The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Question

After signing the third parties assemblies and adding them to GAC I am getting the below error: also the Assembly Binder Log Entry shows this error

It says mismatch

Answer 1

I faced similar problem. In my case, I was having multiple projects in my solution.

One of the project was referring EntityFramework 4.0 and that project was being referred in another project that was referring to EntityFramework 5.0. I brought them in sync and the problem got away.