C# program to count emails by domain

I have a string of emails seperated by semi colon as shown below. 
string UserInputEmails = "aa@xyz.com;cc@abc.com;bb@abc.com;dd@abc.com";


Write a c# program, that lists the total number of emails by domain. The program should give the following output.
Domain = xyz.com & Count = 1
Domain = abc.com & Count = 3


using System;
using System.Linq;


namespace SamplePrograms
{
    class CountEmailsByDomain
    {
        public static void Main()
        {
            // User List of emails seperated by semi colon. You can have as many
            // number of emails you want in this string.
            string UserInputEmails = "aa@xyz.com;cc@abc.com;bb@abc.com;dd@abc.com";


            // Split the string into a string array.
            string[] UserEmails = UserInputEmails.Split(';');


            // Select only the domain part of the emails into a string array, using substring() function
            string[] EmailsDomain = UserEmails.Select(x => x.Substring(x.LastIndexOf("@") + 1)).ToArray();


            // Group the emails by email domain, and select the Domain and respective count
            var Result = EmailsDomain.GroupBy(x => x).Select(y => new { Domain = y.Key, Count = y.Count() });


            // Finally print the domain name and the emails count
            foreach (var obj in Result)
            {
                Console.WriteLine("Domain = {0} & Count = {1}",obj.Domain, obj.Count);
            }
        }
    }
}