Added code sample folders and files. From CSharp book
Updated HelloWorld example.
changed HelloWorld.sln project to test pushing to origin
did the examples of Chapter 4 from codeSamples.
Merge branch 'codeSamples' of github.com:asavv/CsharpAttemtps into codeSamples

Conflicts:
	codeSamples/Chapter 4/Selection/Selection/MainWindow.xaml.cs
	codeSamples/Chapter 4/SwitchStatement/SwitchStatement/MainWindow.xaml.cs

Has Chapter 4 solved.