Design Patterns - Singleton Pattern
SingleTon Pattern: In Singleton Design pattern we restrict the number of instances of a class to 1. So for a particular class we can have only one object. The singleton class should have a global point of access. Steps to create Singleton class: 1) Declare the instance of a class as static 2) create a private constructor( so that nobody can create new object ) 3) Define a static method to create the instance of a class. If the instance already exists return the same instance and if it doesn't exist create a new one. Example: class Sample { private static Sample inst = null; private static readonly object objLock = new object(); private Sample(){} public static Sample CreateInstance() { lock (objLock) { if (inst == null) { inst = new Sample(); } } return inst; } }