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Compiler Error CS0146

Circular base class dependency involving 'class1' and 'class2'

The inheritance list for a class includes a direct or indirect reference to itself. A class cannot inherit from itself. For more information, see Inheritance (C# Programming Guide).

The following sample generates CS0146:

// CS0146.cs
namespace MyNamespace
{
   public interface InterfaceA
   {
   }

   public class MyClass : InterfaceA, MyClass2
   {
      public void Main()
      {
      }
   }

   public class MyClass2 : MyClass   // CS0146
   {
   }
}