ResolverHelper [AutoMapper]

        sealed class ResolverHelper {

            public static ValueResolver<TSource,TDestination> Resolve<TSource,TDestination>(Func<TSource,TDestination> faction) {
                return new DynamicResolver<TSource,TDestination>(faction);
            }
        }

        class DynamicResolver<TSource,TDestination>:ValueResolver<TSource,TDestination> {

            readonly Func<TSource,TDestination> _faction;

            public DynamicResolver(Func<TSource,TDestination> faction) {
                _faction = faction;
            }

            protected override TDestination ResolveCore(TSource source) {
                return _faction(source);
            }
        }