C#: Extern Aliases

• If you have to reference types that have the same name and same namespace, you can use extern aliases to bypass this issue

• Extern aliases also give you a way to access a single type from two (or more) different versions of the same assembly

• To reference two assemblies with the same fully-qualified type names, an alias must be specified on the command line, as follows:
  /r:GridV1=grid.dll/r:GridV2=grid20.dllor
  
From Solution Explorer -> Select Project -> References -> on the Grid -> Right-click -> Select Properties -> Change "Aliases" property:

•  

• Add the following directive to the top of the code file: extern alias GridV1;extern alias GridV2;

Reference:
 http://msdn.microsoft.com/en-us/library/ms173212(v=vs.80).aspx
 http://blogs.msdn.com/b/ansonh/archive/2006/09/27/774692.aspx