using System;

public class Program

{

    public static void Main()

    {

        var wrapped = new Wrap<Foo>();

        var id = wrapped.Project(x=>x.FooID);

        Console.WriteLine(id);

        wrapped.Project(x=>x.FooID = 99);

        Console.WriteLine(id);

        Console.WriteLine(id);

        id = wrapped.Project(x=>x.FooID);

        Console.WriteLine("Hello World");

    }

}

public class Wrap<TModel>

    where TModel : class

{

    public TModel InternalObject { get; set; }

    public Wrap()

    {

        this.InternalObject = Activator.CreateInstance<TModel>();

    }

    public TResult Project<TResult>(Func<TModel, TResult> function)

    {

        return function.Invoke(this.InternalObject);

    }

    //public void Project(Func<TModel> function)

    //{

    //  function.Invoke(this.InternalObject);

    //}

}

public class Foo{

    public int FooID{get;set;}

}