Absolute/outer and inner namespace confusion in C#

Question

using Foo.Uber;

namespace MyStuff.Foo
{
    class SomeClass{
        void DoStuff(){
            // I want to reference the outer "absolute" Foo.Uber
            // but the compiler thinks I'm refering to MyStuff.Foo.Uber
            var x = Foo.Uber.Bar();
        }
    }
}

How could I solve this? Just moving the using statement inside my namespace doesn't help.

Answer 1

您可以使用命名空间别名限定符 （通常为global::来引用默认/根命名空间：

global::Foo.Uber

Answer 2

You can actually specify the full path via the root namespace

var x = global::Foo.Uber.Bar();

Namespaces Overview

A namespace has the following properties:

• They organize large code projects.

• They are delimited with the . operator.

• The using directive means you do not need to specify the name of the namespace for every class.

• The global namespace is the "root" namespace: global::system will always refer to the .NET Framework namespace System .

I prefer this over aliases because when you read it, you know exactly what is going on. Aliases can be easy to misunderstand if you skip over the definition.

Answer 3

Alias the namespace in the using statement:

using ThatOuterFoo = Foo.Uber;
...
...
//Some time later...
var x = ThatOuterFoo.Bar();

Answer 4

You can use using alias directives

using Outer = Foo.Uber;

namespace MyStuff.Foo
{
    class SomeClass{
        void DoStuff(){                
            var x = new Outer.Bar(); //outer class
        }
    }
}

Answer 5

Using Aliaseseseseseses

using Foo.Uber;
using FooUberBar = Foo.Uber.Bar

namespace MyStuff.Foo
{
    class SomeClass{
        void DoStuff(){
            // I want to reference the outer "absolute" Foo.Uber
            // but the compiler thinks I'm refering to MyStuff.Foo.Uber
            var x = FooUberBar();
        }
    }
}

Answer 6

您可以在MSDN中描述的using指令中指定别名。