gistfile1.txt

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Runtime.InteropServices;

namespace Code
{
    public sealed class Program
    {
        static void Main(string[] args)
        {
            var people = new List<Person>()
            {
                new Person("Alex"),
                new Person("Jamie"),
                new Person("Daniel")
            };


            //declare a param "person" of type Person
            var paramExpression = Expression.Parameter(typeof (Person), "person");

            //perform member-access to get Person.Name
            var membeExpression = Expression.PropertyOrField(paramExpression, "Name");
            
            //define const string "Alex"
            var constExpression = Expression.Constant("Alex", typeof (string));

            //test the value of .Name against this constant
            var binarExpression = Expression.Equal(membeExpression, constExpression);

           //wrap the whole thing up in a lambda
            var lambda = Expression.Lambda<Func<Person, bool>>(binarExpression, paramExpression);

            var person = people.Where(lambda.Compile());

            Debugger.Break();
        }
    }


    public class Person
    {
        public string Name { get; set; }

        public Person(string name)
        {
            Name = name;
        }
    }
}