Design Patterns in .NET Core 3: Reusable Approaches in C# and F# for Object-Oriented Software Design

© Dmitri Nesteruk 2020

D. NesterukDesign Patterns in .NET Core 3https://doi.org/10.1007/978-1-4842-6180-4_6

6. Singleton

Dmitri Nesteruk¹  

(1)

St. Petersburg, c.St-Petersburg, Russia

 

The original version of this chapter was revised. A correction to this chapter is available at https://​doi.​org/​10.​1007/​978-1-4842-6180-4_​26

When discussing which patterns to drop, we found that we still love them all. (Not really – I’m in favor of dropping Singleton. Its use is almost always a design smell.)

—Erich Gamma

The Singleton is by far the most hated design pattern in the (rather limited) history of design patterns. Just stating that fact, however, doesn’t mean you shouldn’t use the singleton: a toilet brush is not the most pleasant device either, but sometimes ...