Placing using before namespace{} or in namespace{} - What's the difference?

[Empire City]

Can someone tell me what is the difference in placing the using in the
namespace{} and before the namespace{} ?

namespace MyProj
{
using System;
using System.Web;
}

using System;
using System.Web;
namespace MyProj
{
}

[Joe Mayo]

Re: Placing using before namespace{} or in namespace{} - What's the difference?

Hi Empire,

Comments in-line.

"Empire City" <a@b.com> wrote in message
news:Pwdub.2061 74$pT1.39657@tw ister.nyc.rr.co m...[color=blue]
> Can someone tell me what is the difference in placing the using in the
> namespace{} and before the namespace{} ?
>
> namespace MyProj
> {
> using System;
> using System.Web;
> }[/color]

Here the using statements only apply to the code within the block defined by
MyProj. If you added another namespace to the same file, like this:

namespace MyOtherProj
{
class MyClass { Int32 myInt; }
}

You would get a compiler error "The type or namespace Int32 could not be
found...".
[color=blue]
> using System;
> using System.Web;
> namespace MyProj
> {
> }[/color]

On this one, the using statements apply to all code in this file. For
example, if I defined:

namespace MyOtherProj
{
}

in the same file, I wouldn't need to re-define the using statements.

I suppose if someone felt a need to define multiple namespaces in the same
file, the second format would be useful.

Joe
--

http://www.csharp-station.com

[Empire City]

Re: Placing using before namespace{} or in namespace{} - What's the difference?

OK, thank you. Makes perfect sense now. I think what threw me off was the
Duwamish example puts the using within the namespace, while when you create
a web form the usings are above the namespace.

--

"Joe Mayo" <jmayo@ddiieess ppaammeerrssddi iee.com> wrote in message
news:uFgn1eYrDH A.2480@TK2MSFTN GP10.phx.gbl...[color=blue]
> Hi Empire,
>
> Comments in-line.
>
> "Empire City" <a@b.com> wrote in message
> news:Pwdub.2061 74$pT1.39657@tw ister.nyc.rr.co m...[color=green]
> > Can someone tell me what is the difference in placing the using in the
> > namespace{} and before the namespace{} ?
> >
> > namespace MyProj
> > {
> > using System;
> > using System.Web;
> > }[/color]
>
> Here the using statements only apply to the code within the block defined[/color]
by[color=blue]
> MyProj. If you added another namespace to the same file, like this:
>
> namespace MyOtherProj
> {
> class MyClass { Int32 myInt; }
> }
>
> You would get a compiler error "The type or namespace Int32 could not be
> found...".
>[color=green]
> > using System;
> > using System.Web;
> > namespace MyProj
> > {
> > }[/color]
>
> On this one, the using statements apply to all code in this file. For
> example, if I defined:
>
> namespace MyOtherProj
> {
> }
>
> in the same file, I wouldn't need to re-define the using statements.
>
> I suppose if someone felt a need to define multiple namespaces in the same
> file, the second format would be useful.
>
> Joe
> --
> http://www.csharp-station.com
>
>[/color]