Index Initializers in C# 6

In C# 6 Indexes can be initialized easily with neat & clean code,

var user = new User
{
   [1] = "[email protected]",
   [2] = "[email protected]",
   [3] = "[email protected]",
   [4] = "[email protected]",
   [5] = "[email protected]",
   UserName = "BNarayan",
   ContactNumber= "99xxxxxxxx"
};

Complete Code

namespace IndexInitializersCSharp6
{

    class User
    {
        public string UserName { get; set; }
        private string[] EmailIds = new string[10];
        public string ContactNumber { get; set; }
        public string this[int index]
        {
            set { EmailIds[index] = value; }
            get { return EmailIds[index]; }
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            var user = new User
            {
                [1] = "[email protected]",
                [2] = "[email protected]",
                [3] = "[email protected]",
                [4] = "[email protected]",
                [5] = "[email protected]",
                UserName = "BNarayan",
                ContactNumber= "99xxxxxxxx"
            };
        }
    }
}