My Singleton in C #

Mysingleton
Using System;
Singletonpage Class
Class Singletonpage
{
Fields
protected static singletonpage checkoutpage;


constructor is protected to ensure Singleton
Protected Singletonpage ()
{
Console.WriteLine ("If you are line,then the only one instence is created!");
}

Use the to Create Singletonpage instance
public static Singletonpage Newcheckoutpage ()
{
if (checkoutpage==null)
Checkoutpage= new Singletonpage ();
return checkoutpage;
}

};
-------------------------------------End of Singletonpage Class


TestApp
Class TESTAPP
{
public static void Main (string[] args)
{
Console.WriteLine ("' Create ' PageA:");
Singletonpage Pagea=singletonpage.newcheckoutpage ();

Console.WriteLine ("' Create ' PageB:");
Singletonpage Pageb=singletonpage.newcheckoutpage ();

Console.WriteLine ("' Create ' Pagec:");
Singletonpage Pagec=singletonpage.newcheckoutpage ();

Console.WriteLine ("' Create ' paged:");
Singletonpage Paged=singletonpage.newcheckoutpage ();

while (true) {}
}
};