asp.net System.Guid ToString five formats

Reference:https://msdn.microsoft.com/en-us/library/97af8hh4.aspx

Test code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace GuidToString
{
  class Program
  {
    static void Main(string[] args)
    {
      Console.WriteLine("" --">" + System.Guid.NewGuid().ToString());
      Console.WriteLine("N"--">" + System.Guid.NewGuid().ToString("N");
      Console.WriteLine("D"--">" + System.Guid.NewGuid().ToString("D");
      Console.WriteLine("B"}}--">" + System.Guid.NewGuid().ToString("B"));
      Console.WriteLine("P--">" + System.Guid.NewGuid().ToString("P"));
      Console.WriteLine("X--">" + System.Guid.NewGuid().ToString("X"));
      Console.ReadKey();
    }
  }
}

Test results:

Note: Only N, D, B, P, X (case insensitive) can be used. Using other letters will cause an exception

The format string can only be "D", "d", "N", "n", "P", "p", "B", "b", "X", or "x".

Exception situations:

The following are all normal:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace GuidToString
{
  class Program
  {
    static void Main(string[] args)
    {
      Console.WriteLine("" --">" + System.Guid.NewGuid().ToString());
      Console.WriteLine("" --">" + System.Guid.NewGuid().ToString(""));
      Console.WriteLine("N"--">" + System.Guid.NewGuid().ToString("N");
      Console.WriteLine("n"--">" + System.Guid.NewGuid().ToString("n");
      Console.WriteLine("D"--">" + System.Guid.NewGuid().ToString("D");
      Console.WriteLine("d"--">" + System.Guid.NewGuid().ToString("d");
      Console.WriteLine("B"}}--">" + System.Guid.NewGuid().ToString("B"));
      Console.WriteLine("b--">" + System.Guid.NewGuid().ToString("b"));
      Console.WriteLine("P--">" + System.Guid.NewGuid().ToString("P"));
      Console.WriteLine("p--">" + System.Guid.NewGuid().ToString("p"));
      Console.WriteLine("X--">" + System.Guid.NewGuid().ToString("X"));
      Console.WriteLine("x--">" + System.Guid.NewGuid().ToString("x"));
      Console.ReadKey();
    }
  }
}

Several formats of Guid.NewGuid().ToString()

1The result of Guid.NewGuid().ToString("N") is:
38bddf48f43c48588e0d78761eaa1ce6

2The result of Guid.NewGuid().ToString("D") is:
57d99d89-caab-482a-a0e9-a0a803eed3ba

3The result of Guid.NewGuid().ToString("B") is:
{09f140d5-af72-44ba-a763-c861304b46f8}

4The result of Guid.NewGuid().ToString("P") is:
(778406c2-efff-4262-ab03-70a77d09c2b5)