Describe the Singleton pattern

What problem does the Singleton pattern try to solve

• The Singleton pattern is used to enforce just one object instance, all further references refer to the same underlying instance.
• The class itself should be responsible for creating the instance of itself

How to implement it

• Hide the constructor so the class cannot be instantiated from the external code
• Define a public static operation GetInstance or property Current

Other information

• It's creational pattern
• It was defined by Gang of Four (GoF)