Guid.NewGuid().ToString("N")

 N表示格式符

static void Main(string[] args)
        {
            var guid = Guid.NewGuid();
            Console.WriteLine("{0}:{1}", "", guid.ToString());
            foreach (var i in new string[] { "P", "N", "B", "P", "X" })
            {
                Console.WriteLine("{0}:{1}",i,guid.ToString(i));
            }
            Console.Read();
        }