DerivedClassMappedInterface.cs

void Main()
{
   Mapper.CreateMap(typeof(MyClass), typeof(IMyInterface));

   Mapper.AssertConfigurationIsValid();

   var myClassInstance = new MyClass { Container = 3 };

   var implementedClassInstance = new ImplementedClass();

   var obj2 = Mapper.Map(myClassInstance, typeof(MyClass), typeof(ImplementedClass));
   obj2.Dump();
   obj2 = Mapper.Map<ImplementedClass>(myClassInstance);
   obj2.Dump();
}

public interface IMyInterface
{
    int Container { get; set; }
}

public class ContainerClass
{
    public int MyProperty { get; set; }
}

public class ImplementedClass : IMyInterface
{
    public int Container { get;set; }
}

public class MyClass
{
    public int Container { get; set; }
}