What happens when sql connections runs out? You are gonna wait

ConnPoolOverflowDemo.cs

    class Program
    {
     //  connection pool "overflow" demo
        private const int ConnSize = 150;

        static void Main(string[] args)
        {
            var connections = new SqlConnection[ConnSize];
            for (int i = 0; i < ConnSize; i++)
            {
                connections[i] = new SqlConnection("Data source=bb5\\bb5;Initial Catalog=chatode;Integrated Security=SSPI; Async=True");
                connections[i].Open();
                var cmd = new SqlCommand("select * from TheInteger", connections[i]);
                IAsyncResult r = cmd.BeginExecuteReader();
               
                Console.WriteLine("conn {0}", i);
            }

            Console.ReadLine();

            for (int i = 0; i < 100; i++)
            {
                connections[i].Close();
            }
        }
    }