A Namespace in Microsoft .Net is like containers of objects. They may contain unions, classes, structures, interfaces, enumerators and delegates. Main goal of using namespace in .Net is for creating a hierarchical organization of program. In this case a developer does not need to worry about the naming conflicts of classes, functions, variables etc., inside a project.
In Microsoft .Net, every program is created with a default namespace. This default namespace is called as global namespace. But the program itself can declare any number of namespaces, each of them with a unique name. The advantage is that every namespace can contain any number of classes, functions, variables and also namespaces etc., whose names are unique only inside the namespace. The members with the same name can be created in some other namespace without any compiler complaints from Microsoft .Net.
To declare namespace C# .Net has a reserved keyword namespace. If a new project is created in Visual Studio .NET it automatically adds some global namespaces. These namespaces can be different in different projects. But each of them should be placed under the base namespace System. The names space must be added and used through the using operator, if used in a different project.
Please now have a look at the example of declaring some namespace:
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UsingSystem;
namespace OutNamespace
{
Namespace WorkNamespace
{ /// can be placed some classes, structures etc.
}
}