dirinfo.cs

using System;
using System.IO;

class Program {
  public static void Main() {
    var d = new DirectoryInfo("buzz");
    Console.WriteLine("Exists:{0} Name:{1}\n", d.Exists, d.Name);

    Console.WriteLine("Create()");
    d.Create();
    Console.WriteLine("Exists:{0} Name:{1}\n", d.Exists, d.Name);

    Console.WriteLine("Refresh()");
    d.Refresh();
    Console.WriteLine("Exists:{0} Name:{1}\n", d.Exists, d.Name);

    Console.WriteLine("MoveTo(\"zing\")");
    d.MoveTo("zing");
    Console.WriteLine("Exists:{0} Name:{1}\n", d.Exists, d.Name);

    Console.WriteLine("Refresh()");
    d.Refresh();
    Console.WriteLine("Exists:{0} Name:{1}\n", d.Exists, d.Name);

    Console.WriteLine("Delete()");
    d.Delete();
    Console.WriteLine("Exists:{0} Name:{1}\n", d.Exists, d.Name);

    Console.WriteLine("Refresh()");
    d.Refresh();
    Console.WriteLine("Exists:{0} Name:{1}\n", d.Exists, d.Name);
  }
}

dotnet4.out

#.NET 4.0 on Windows 7 x64

Exists:False Name:buzz

Create()
Exists:False Name:buzz

Refresh()
Exists:True Name:buzz

MoveTo("zing")
Exists:True Name:zing

Refresh()
Exists:True Name:zing

Delete()
Exists:True Name:zing

Refresh()
Exists:False Name:zing

mono.out

#[~/dev/csharp/1054337]mono --version
#Mono JIT compiler version 2.11 (master/e00fb73 Wed Jun 29 10:10:10 MDT 2011)
#Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
#	TLS:           normal
#	SIGSEGV:       normal
#	Notification:  kqueue
#	Architecture:  x86
#	Disabled:      none
#	Misc:          softdebug 
#	LLVM:          supported, not enabled.
#	GC:            Included Boehm (with typed GC)

Exists:False Name:buzz

Create()
Exists:False Name:buzz

Refresh()
Exists:True Name:buzz

MoveTo("zing")
Exists:True Name:buzz

Refresh()
Exists:False Name:buzz

Delete()

Unhandled Exception: System.IO.DirectoryNotFoundException: Directory does not exist.
  at System.IO.Directory.Delete (System.String path) [0x00000] in <filename unknown>:0 
  at System.IO.Directory.Delete (System.String path, Boolean recursive) [0x00000] in <filename unknown>:0 
  at System.IO.DirectoryInfo.Delete (Boolean recursive) [0x00000] in <filename unknown>:0 
  at System.IO.DirectoryInfo.Delete () [0x00000] in <filename unknown>:0 
  at Program.Main () [0x00000] in <filename unknown>:0