Question

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

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Customer> custList = new List<Customer>();

            custList.Add(new Customer { Name = "P1" });
            custList.Add(new Customer { Name = "P2" });
            custList.Add(new Customer { Name = "P3" });
            custList.Add(new Customer { Name = "P4" });
            custList.Add(new Customer { Name = "P5" });

            List<Customer> vendorList = new List<Customer>();
            vendorList.Add(new Customer { Name = "P1" });
            vendorList.Add(new Customer { Name = "P2" });

            //var v = custList.SelectMany(


        }
    }

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

}

How do i copare these 2 lists and find only those customers who are present in custList as well as vendorList?

Answer 1

From a comment to another answer:

Intersect expects both lists to be of
same type. What if they are not of
same type and what if property name is
different in both lists? How do i use
SelectMany here

In this case, you may wish to utilize Join. Such as

var result = from item1 in list1
             join item2 in list2
             on item1.Foo equals item2.Bar
             select new { item1, item2 }; // select whatever you need in the resultset