The located assembly's manifest definition does not match the assembly reference

Question

I am trying to run some unit tests in a C# Windows Forms application (Visual Studio 2005), and I get the following error:

System.IO.FileLoadException: Co

Answer 1

I got the same error... In my case it got resolved as follows:

• At first when the application was installed then the people here had used Microsoft Enterprise Library 4.1 in the application.
• In previous week my machine was formatted & after that today when I built that application then it gave me an error that Enterprise Library assembly is missing.
• Then I installed Microsoft Enterprise Library 5.0 which I got on Google as first search entry.
• Then when I built the application then it gave me the above error i.e. The located assembly's manifest definition does not match the assembly reference.
• After much of a search work & analysis, I found that application was referring 4.1.0.0 & the DLL in the bin folder was of the version 5.0.0.0
• What i did was then I installed the Microsoft Enterprise Library 4.1.
• Removed the previous reference(5.0) & added the 4.0 reference.
• Built the application & voila...it worked.