C sharp - MsgBox en C#

Hay algún método o alguna clase que implemente el típico mensaje de aviso de visual basic msgBox en C#?? GRACIAS

Un saludo, Javi

Claro que existe y se llama MessageBox.Show()

using System;
using Microsoft.CSharp;
using System.Text;
using System.Collections;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace BLL
{
public class WebMsgBox
{
protected static Hashtable handlerPages = new Hashtable();

private WebMsgBox()
{
}

public static void Show(string Message)
{
if (!(handlerPages.Contains(HttpContext.Current.Handler)))
{
Page currentPage = (Page)HttpContext.Current.Handler;

if (!((currentPage == null)))
{
Queue messageQueue = new Queue();
messageQueue.Enqueue(Message);
handlerPages.Add(HttpContext.Current.Handler, messageQueue);
currentPage.Unload += new EventHandler(CurrentPageUnload);
}
}
else
{
Queue queue = ((Queue)(handlerPages[HttpContext.Current.Handler]));
queue.Enqueue(Message);
}
}

private static void CurrentPageUnload(object sender, EventArgs e)
{
Queue queue = ((Queue)(handlerPages[HttpContext.Current.Handler]));
if (queue != null)
{
StringBuilder builder = new StringBuilder();
int iMsgCount = queue.Count;
builder.Append("<script language='javascript'>");
string sMsg;
while ((iMsgCount > 0))

{
iMsgCount = iMsgCount - 1;
sMsg = System.Convert.ToString(queue.Dequeue());
sMsg = sMsg.Replace(""", "'");
builder.Append("alert( "" + sMsg + "" );");
}

builder.Append("</script>");
handlerPages.Remove(HttpContext.Current.Handler);
HttpContext.Current.Response.Write(builder.ToString());
}
}
}
}

si usa MessageBox.show("Mensage aqui.. :D");