using System;

public class Program

{

    public class Entity

    {

        public int Id { get; set; }

        public string Name { get; set; }

    }

    public class Person : Entity

    {

        public string SomeOtherShizzle { get; set; }

    }

    public static void Main()

    {

        var person = new Person { Id = 1, Name = "Steve", SomeOtherShizzle = "hoobydooby" };

        var theFunc = DoSomething<Func<Person,bool>, Person>(person);

        // func<Entity, bool>

    }

    public static F DoSomething<F,E>(E e) 

        where E : Entity

        //where F : Func<Entity,bool>

    {

        if(e is Person)

        {

            var thePerson = e as Person;

            Func<Person,bool> blah = x => x.Name == "Steve";

            return blah;

        }

        return default(F);

    }

}