How to get the namespace alias operator :: to work under C#?

Question

I\'ve come up against the unlikely scenario when I reference two external assemblies that both have the same namespace and type names. When I try to use the type, the compil

Answer 1

When you reference some assembly in project it has default alias "global". When you add another alias for that assembly, e.g. "global, AssemblyA", you will reference it like this:

using SomeTypeAlias = AssemblyA::Company.Product.SomeType;

or:

void SomeMethod(AssemblyA::Company.Product.SomeType someType) { ... }

Answer 2

Try this:

extern alias asm1;
extern alias asm2;

namespace Client
{
    class Program
    {
        static void Main(string[] args)
        {
            asm1.MyNs.MyClass mc1 = null;
            asm2.MyNs.MyClass mc2 = null;
        }
    }
}

And add global,asm1 to the project reference for assembly1 and global,asm2 for assembly2

Answer 3

extern alias alias1;
using alias1::Namespace;

Answer 4

I think you need to use an extern alias. Anson Horton has a good blog on this problem and how to use extern alias to fix it.