Difference in using the using clause within the namespace [duplicate]

Is there any difference in performance / execution / compilation of C # code when using the using clauses within the namespace?

Basically, what I want to know is whether there is any difference (beyond structuring) in the following code snippets:

namespace Projeto.App
{
    using System;
    using System.Linq;
    using Projeto.App.Views;
    ...

and

using System;
using System.Linq;
using Projeto.App.Views;

namespace Projeto.App
{
    ...