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Compiler Error CS0534

'function1' does not implement inherited abstract member 'function2'

A class is required to implement all the abstract members in the base class, unless the class is also abstract.

The following sample generates CS0534:

// CS0534.cs  
namespace x  
{  
   abstract public class clx  
   {  
      public abstract void f();  
   }  
  
   public class cly : clx   // CS0534, no override for clx::f  
   {  
      // uncomment the following sample override to resolve CS0534  
      // override public void f()  
      // {  
      // }  
  
      public static int Main()  
      {  
         return 0;  
      }  
   }  
}