13.AsociativeArrays-Company Users

13. Company Users
Write a program that keeps information about companies and their employees.
You will be receiving a company name and an employee's id, until you receive the command "End" command. Add each employee to the given company. Keep in mind that a company cannot have two employees with the same id.
When you finish reading the data, order the companies by the name in ascending order.
Print the company name and each employee's id in the following format:
{companyName}
-- {id1}
-- {id2}
-- {idN}
Input / Constraints
• Until you receive the "End" command, you will be receiving input in the format: "{companyName} -> {employeeId}".
• The input always will be valid.
Examples
Input                     Output
SoftUni -> AA12345        HP
SoftUni -> BB12345        -- BB12345
Microsoft -> CC12345      Microsoft
HP -> BB12345             -- CC12345
End                       SoftUni
                          -- AA12345
                          -- BB12345

SoftUni -> AA12345        Lenovo
SoftUni -> CC12344        -- XX23456
Lenovo -> XX23456         Movement
SoftUni -> AA12345        -- DD11111
Movement -> DD11111       SoftUni
End                       -- AA12345
                          -- CC12344


namespace _13CompanyUsers
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    class Program
    {
        static void Main()
        {
            var companies = new Dictionary<string, List<string>>();

            var inputLine = Console.ReadLine();

            while (inputLine != "End")
            {
                var inputArray = inputLine.Split(" -> ");
                var companyName = inputArray[0];
                var employeeID = inputArray[1];

                if (!companies.ContainsKey(companyName))
                {
                    companies.Add(companyName, new List<string>());
                }

                if (!companies[companyName].Contains(employeeID))
                {
                    companies[companyName].Add(employeeID);
                }

                inputLine = Console.ReadLine();
            }


            foreach (var item in companies.OrderBy(x => x.Key))
            {
                Console.WriteLine($"{item.Key}");

                foreach (var employeeID in item.Value)
                {
                    Console.WriteLine($"-- {employeeID}");
                }
            }
        }
    }
}