>Could be different versions of the assembly.
>
I found that program.cs file somehow is added to Middleware project in addition to being in test project. This seems to be a mistake, I don't know how did this happen. May be I accidentally dragged it into a wrong place although I don't think I did.
I'll remove it and see if it will fix the problem.
UPDATE. The project now compiled OK.
If it's not broken, fix it until it is.
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