Cannot compile the clone project with .Net Framework <= 4.0

[tonginbox]

NHttp/NHttp/HttpTimeoutManager.cs

Line 21 in 41e1bf3

throw new ArgumentNullException(nameof(server));

The code using 'nameof(...)' which is C# 6.0/Framework 4.x but the NHttp project target framework 2.0 therefore the project fail to compile.

Is this a mistake?

I target it to run on .Net 4.0 therefore I have to remove all of them and it works.