Removing C# 6 features

[conniey]

There are C# 6 features in use (ie. NumericConfig.cs) which will not build in Visual Studio 2013. This removes those features.

@NightOwl888 @synhershko : Alternatively, I can replace the C# 6 features. What do you think?

[NightOwl888]

Thanks for informing - this was something that slipped in by accident. Ever since I first noticed that VS2012 can't compile these features, I have been trying to keep them out of the code base.

Is NumericConfig.cs the only culprit, or are there more?

[conniey]

@NightOwl888 I replaced all the C# 6 features instead, so it'll continue to work in older VS versions.

[jeme]

FYI: Project Properties -> Build -> Advanced -> Language Version.
e.g. 4 (this will disallow the use in future VS versions as well)

I Would have gone in the other direction though and migrate up and just accept that it won't build in older versions, unless there is a build server issue somewhere?

After all the new features help keeping the code cleaner on many parts.