Contributors: 6
Licensed under: CC-BY-SA

Not affiliated with Stack Overflow
Rip Tutorial:

Download eBook

Statically Initialized Singleton

Download c# eBook


public class Singleton
    private readonly static Singleton instance = new Singleton();
    private Singleton() { }
    public static Singleton Instance => instance;

This implementation is thread-safe because in this case instance object is initialized in the static constructor. The CLR already ensures that all static constructors are executed thread-safe.

Mutating instance is not a thread-safe operation, therefore the readonly attribute guarantees immutability after initialization.