Types of Classes

We have two types of classes..

1) Factory 2) Singleton

1) Factory : You can create a multiple object of factory class.

2) Singleton : only one instance of the class is created ex..Mouse Pointer,window popup.

//singleton programme

using system;
public class singleton
{
private static singleton instance;

private singleton()
{
}
public static singleton instance
{
get
{
if(instance==null)
{
instance=new singleton();
}
return instance;
}
}
}