// Compiler options: -r:MyAssembly01=test-externalias-00-lib.dll -r:MyAssembly02=test-externalias-01-lib.dll extern alias MyAssembly01; extern alias MyAssembly02; using System; public class Test { public static void Main () { MyAssembly01::GlobalClass.JustForFirst (); MyAssembly02::GlobalClass.JustForSecond (); MyAssembly01::Namespace1.MyClass1.JustForFirst (); MyAssembly02::Namespace1.MyClass1.JustForSecond (); } }