Question

Exactly as the title says, I think I was looking at c# code when I saw this a while back, I never took much notice of it, but what does :: Mean in c#. I think I saw something like myVar::Process.Start()

Answer 1

It is the namespace alias qualifier – if you use namespace aliases:

using config = System.Configuration;

...

var value = config::ConfigurationManager.AppSettings["Somthing"];

It helps disambiguating when you have types with the same name in the same scope.

For example – if you have several Leg classes (one for furniture, one for the leg of a journey), and both are in imported namespaces, with the result that when you use Leg in your code the compiler can’t tell which one you mean, then if you have a namespace aliases to the namespaces, you can use <alias>::Leg to refer to the exact type you mean.

There is a default alias global for the global namespace.