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Compiler Error CS0629 

Error Message

Conditional member 'member' cannot implement interface member 'base class member' in type 'Type Name'

The Conditional attribute cannot be used on the implementation of an interface.

The following sample generates CS0629:

// CS0629.cs
interface MyInterface
   void MyMethod();

public class MyClass : MyInterface
   public void MyMethod()    // CS0629, remove the Conditional attribute

   public static void Main()

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