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- // In software engineering, the singleton pattern is a design pattern used to implement the mathematical
- // concept of a singleton, by restricting the instantiation of a class to one object. This is useful when
- // exactly one object is needed to coordinate actions across the system. The concept is sometimes generalized
- // to systems that operate more efficiently when only one object exists, or that restrict the instantiation
- // to a certain number of objects.
- public sealed class MySingleton
- {
- private static MySingleton instance;
- private static readonly Object sync = new object();
- private MySingleton()
- {
- // initialize members here
- }
- public static MySingleton Instance
- {
- get
- {
- if (instance == null)
- {
- lock (sync)
- {
- if (instance == null)
- instance = new MySingleton();
- }
- }
- return instance;
- }
- }
- public void SayHello()
- {
- Console.WriteLine("Hello!");
- }
- }
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