using System;
using System.Collections.Generic;
using System.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var allProducts = new List<Product>
                {
                    new Product() {Name = "Cornflakes", Price = 100},
                    new Product() {Name = "Cornflakes", Price = 200},
                    new Product() {Name = "Rice Krispies", Price = 300},
                    new Product() {Name = "Cornflakes", Price = 400}
                };

            var products = allProducts.Where(w => (!allProducts.Any(l=>l.Name.Equals(w.Name) && l != w)));

            foreach (Product product in products)
            {
                Console.WriteLine("Name: {0}, Price: {1}", product.Name, product.Price);
            }

        }

        public class Product
        {
         
            public string Name { get; set; }
            public decimal Price { get; set; }
        }
    }
}