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Compiler Error CS1599

Method or delegate cannot return type 'type'

Some types in the base class library, for example, TypedReference and ArgIterator cannot be used as return types.

The following sample generates CS1599:

// CS1599.cs
using System;

class MyClass
{
   public static void Main()
   {
   }

   public TypedReference Test1()   // CS1599
   {
      return null;
   }

   public ArgIterator Test2()   // CS1599
   {
      return null;
   }
}
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