:: Operator (C# Reference)

The namespace alias qualifier (::) is used to look up identifiers. It is always positioned between two identifiers, as in this example:

global::System.Console.WriteLine("Hello World");


The namespace alias qualifier can be global. This invokes a lookup in the global namespace, rather than an aliased namespace.

For More Information

For an example of how to use the :: operator, see the following section:

C# Language Specification

For more information, see the following sections in the C# Language Specification:

  • 7.5.2 Simple names

  • 9.7 Namespace alias qualifiers

See Also


C# Programming Guide


C# Operators

Namespace Keywords (C# Reference)

. Operator (C# Reference)

extern alias (C# Reference)

Other Resources

C# Reference