C# tutorials - hello world

[stevehoag]

Create a basic Hello World tutorial for developers new to C#.

Tutorials should include one or more code examples, each example should also show expected output and should include an explanation of the code where it isn't obvious. Examples shouldn't be dependent on a specific IDE or target platform.

[matthewreily]

If this is still needed please assign to me and I will work on it. cc @BethMassi

[cartermp]

Done!

[matthewreily]

Thanks!

[radu-matei]

Hi, everyone!

I would like to start contribuiting on the .NET Core documentation and I was wondering (not sure if this is the right issue for it, but anyway) wether we might use some code and documentation I have already developed for introducing C# to newer audiences - It is a separate repository with various examples and documentation..

Let me know wether we can use this in any way (I'm surely open to modifications of any kind) or wether I can start creating some new materials.

Thanks!

[tonerdo]

@BillWagner PR open

[BillWagner]

@tsolarin I see that. I will review it later today.

[mairaw]

Duplicate of #942