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 had a different cause: in my case, I had used various nuget package versions previously, and I had an app.config which for some reason had been automatically generated with this kind of content:

So I only had Version 1.1.0.0 installed, but because of this redirect instruction, it looked for 1.1.1.0 even though Visual Studio had the nuget for 1.1.0.0 installed. Changing the newVersion to 1.1.0.0 fixed everything: