It heichiyal order of the class where it developed to over come the drawback of ambiuity of header file system.data.sqlclient is the eg for the same here system -----> is the root name space data-----------> is a class sqlclient ------->is a deveied class syntaxnamespace sabs class ds ''''''' the class def''''end class end namespace

Namespaces allow to group entities like classes, objects and functions under a name. This way the global scope can be divided in "sub-scopes", each one with its own name.

The format of namespaces is:

namespace identifier
{
entities
}

namespace is new keyword or identifier which include input &
output operator like as cout ,cin etc

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