C# Programming/Keywords/global

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The global keyword is useful in some contexts to resolve ambiguity between identifiers. If you have a conflict between a class name and a namespace, for example, you can use the global keyword to access the namespace:

namespace MyApp
{
    public static class System
    {
        public static void Main()
        {
            global::System.Console.WriteLine("Hello, World!");
            // if we had just used System.Console.WriteLine, 
            // the compile would think that we referred to a 
            // class named "Console" inside our "System" class.
        }
    }
}

global does not work in the following situation, however, as our System class does not have a namespace:

public static class System
{
    public static void Main()
    {
        global::System.Console.WriteLine("Hello, World!");
        // "System" doesn't have a namespace, so the above
        // would be referring to this class!
    }
}



C# Keywords
abstract as base bool break
byte case catch char checked
class const continue decimal default
delegate do double else enum
event explicit extern false finally
fixed float for foreach
goto if implicit in int
interface internal is lock long
namespace new null object operator
out override params private protected
public readonly ref return sbyte
sealed short sizeof stackalloc
static string struct switch this
throw true try typeof uint
ulong unchecked unsafe ushort using
var virtual void volatile while
Special C# Identifiers
add alias get global partial
remove set value where yield