I prefer C# to Ruby but .NET Core is still a Release Candidate and it's a v1 product. So in terms of support, documentation, stability, etc you'll probably be

I prefer C# to Ruby but .NET Core is still a Release Candidate and it's a v1 product. So in terms of support, documentation, stability, etc you'll probably be better off with Ruby. If you're considering deploying to Windows/Azure then .NET Core is a little more temping but otherwise...