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Compiler Error CS0535

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'class' does not implement interface member 'member'

A class derived from an interface, but the class did not implement one or more of the interface's members. A class must implement all members of interfaces from which it derives or else be declared abstract.

Example

The following sample generates CS0535.

// CS0535.cs
public interface A
{
   void F();
}

public class B : A {}   // CS0535 A::F is not implemented

// OK
public class C : A {
   public void F() {}
   public static void Main() {}
}

The following sample generates CS0535.

// CS0535_b.cs
using System;
class C : IDisposable {}   // CS0535

// OK
class D : IDisposable {
   void IDisposable.Dispose() {}
   public void Dispose() {}

   static void Main() {
      using (D d = new D()) {}
   }
}