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.NET namespaces and using statements [duplicate]

Possible Duplicate:
Should Usings be inside or outside the namespace

What is the difference between

namespace x
{
  using y;
}

and

using y;
namespace x
{
}

?

like image 657
CodeMonkey1313 Avatar asked Apr 27 '09 20:04

CodeMonkey1313


1 Answers

The first one has y in scope for just the namespace x, the second has y in scope for the whole file, so potentialy other namespaces. If you keep to one namespace per file (I'd guess that was the convention) then there's usually no real difference [but see Marc's comment about clashes if different types have the same name in different namespaces]. If you use StyleCop it will want you to keep the usings inside the namespace.

like image 133
Steve Avatar answered Nov 04 '22 17:11

Steve