What is singleton design pattern ?

Singleton design pattern

Singleton design pattern is type of Creational Design pattern . It creates a single instance object which caters to all the clients.

Singleton Design pattern has :

1. It has private constructor so that instance of class cannot be created anywhere but inside its own methods.

2. It has static read only member so that instance is created only once .

3. It has an instance property to return singleton object instance

Code snippet for simple singleton :

public sealed class Singleton 

{

// private constructor

private Singleton()

{

}

// static readonly member

static readonly Singleton instance = new Sinleton();

// static instance property

Singleton Instance

{

get { return instance ; }

}

 

 

 

 

 

 

}