The singleton pattern is a software design pattern that restricts the instantiation of a class to one “single” instance. This is useful when exactly one object is needed to coordinate actions across the system.
In C#, you use the “static” declaration.
The singleton design pattern solves problems like:[5]
- How can it be ensured that a class has only one instance?
- How can the sole instance of a class be accessed easily?
- How can a class control its instantiation?
- How can the number of instances of a class be restricted?
Example Use:
- Store global variables.
- Helper classes.
- Quick access to methods.
- No need to initial object.
Sources:
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