using MyStringArray = System.Collections.Generic.List<string>;

------解决方案--------------------
C# code

// cs_using_directive2.cs
// Using directive.
using System;   
// Using alias for a class.
using AliasToMyClass = NameSpace1.MyClass;   

namespace NameSpace1 
{
    public class MyClass 
    {
        public override string ToString() 
        {
            return "You are in NameSpace1.MyClass";
        }
    }
}

namespace NameSpace2 
{
    class MyClass 
    {
    }
}

namespace NameSpace3 
{
    // Using directive:
    using NameSpace1;
    // Using directive:
    using NameSpace2;   

    class MainClass
    {
        static void Main() 
        {
            AliasToMyClass somevar = new AliasToMyClass();
            Console.WriteLine(somevar);
        }
    }
}

------解决方案--------------------
好像不行呀，一定得用using！