有什么用集引用在Visual Studio 8的别名属性 [英] What use is the Aliases property of assembly references in Visual Studio 8

问题描述

当我在Visual Studio 8中的别名属性添加程序集引用到一个项目，该引用的，被设置为全局。什么是该物业的好，为什么它设置为全局？

When I add an assembly reference to a project in Visual Studio 8 the Aliases property, of that reference, is set to "global". What is this property good for and why is it set to global?

MSDN告诉我，这是别名组件的列表，但不是为什么我可能要使用此属性或为什么大多数都别名为全局。

MSDN tells me that this is a list of aliases for the assembly but not why I might want to use this property or why most are aliased as "global".

参考MSDN

推荐答案

这是外部别名。假设你要使用两种不同类型，这两种被称为 Foo.Bar （即酒吧在一个命名空间富）。这两种类型将会在不同的组件（定义） - 使用在VS的财产，以别名与每个参考相关联，那么你可以做：

This is for "extern aliases". Suppose you want to use two different types, both of which are called Foo.Bar (i.e. Bar in a namespace of Foo). The two types will be in different assemblies (by definition) - you use the property in VS to associate an alias with each reference, then you can do:

extern alias FirstAlias;
extern alias SecondAlias;

using FirstBar = FirstAlias::Foo.Bar;
using SecondBar = SecondAlias::Foo.Bar;

然后用 FirstBar 和 SecondBar 在code。

所以基本上它命名的一个额外的水平 - 你不应该使用它，除非你真的不得不这样做。这会迷惑了很多人。尽量避免陷入摆在首位这种情况 - 但要知道这种解决方案对于​​那些时间，你就不能避免它

So basically it's an extra level of naming - and you shouldn't use it unless you really, really have to. It will confuse a lot of people. Try to avoid getting into that situation in the first place - but be aware of this solution for those times where you just can't avoid it.

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