using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

​

namespace ConsoleApp3

{

    public class Data

    {

        public int Number { get; set; }

        public string Name { get; set; }

        public override string ToString()

        {

            return $"Number - {Number}, Name - {Name}";

        }

    }

​

    public class Program

    {

        public static void Main(string[] args)

        {

            var list = new List<Data> { new Data { Number = 1, Name = "First" }, new Data { Number=2, Name="Second"} };

​

            var param = Expression.Parameter(typeof(Data), "x");

            var num = Expression.PropertyOrField(param, "Number");

            var body = Expression.Equal(num, Expression.Constant(1));

​

            var lambda = Expression.Lambda<Func<Data, bool>>(body, param);

​

            var list1 = list.FindAll(new Predicate<Data>(lambda.Compile())).ToList();

            foreach (var d in list1)

            {

                Console.WriteLine(d.ToString());

            }

​

        }

    }

}