How to create a class which can only have a single instance in C#

Question

I wonder if there is a mechanism or pattern to allow only one instance of a class in C#. I have heard of the Singleton class, but i don\'t know how to use it we

Answer 1

Singleton is not a class, but rather a pattern. Here is an example:

class Singleton {
    private Singleton() {}

    static private Singleton GetIt() {
        return theOne;
    }

    static private Singleton theOne = new Singleton();
}