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

public class Test
{
	public static void Main()
	{ 
		    var customerAddresses = new[]
		    {
		      new // address #1
		      {
		        customer_id = 6676979,
		        customer_address_seq = 1,
		        customer_address_match_codes = new []
		        {
		          new
		          {
		            customer_address_seq = 1,
		            customer_id = 6676979,
		            customer_match_code_id = 5
		          }
		        }
		      },
		      new // address #2
		      {
		        customer_id = 6677070,
		        customer_address_seq = 1,
		        customer_address_match_codes = new []
		        {
		          new
		          {
		            customer_address_seq = 1,
		            customer_id = 6677070,
		            customer_match_code_id = 4
		          },
		          new
		          {
		            customer_address_seq = 1,
		            customer_id = 6677070,
		            customer_match_code_id = 5
		          },
		          new
		          {
		            customer_address_seq = 1,
		            customer_id = 6677070,
		            customer_match_code_id = 3
		          }
		        }
		      },
		      new // address #3
		      {
		        customer_id = 6677070,
		        customer_address_seq = 2,
		        customer_address_match_codes = new []
		        {
		          new
		          {
		            customer_address_seq = 2,
		            customer_id = 6677070,
		            customer_match_code_id = 4
		          },
		          new
		          {
		            customer_address_seq = 2,
		            customer_id = 6677070,
		            customer_match_code_id = 5
		          }
		        }
		      }
		    };
		    
		        var result = (from c in customerAddresses
		            let isMatch = c.customer_address_match_codes
		                             .Where (cu => cu.customer_match_code_id == 4).Any () &&
		                          c.customer_address_match_codes
		                             .Where (cu => cu.customer_match_code_id == 5).Any ()
		            let betterMatch = isMatch && c.customer_address_match_codes
		                          .Where (cu => cu.customer_match_code_id == 3).Any () ? 1 : 0
		            where isMatch == true
		            orderby betterMatch descending, c.customer_id, c.customer_address_seq
		            select c)
		            .FirstOrDefault ();
		    
    		Console.WriteLine(result);
			
}
}