Singleton Design Pattern C# Example

The Singleton design pattern is a creational design pattern that restricts the instantiation of a class to ensure that there is only one instance of that class created in the entire application. It provides a global point of access to that instance. This pattern is particularly useful when exactly one object is needed to coordinate actions across the system, such as a configuration manager, thread pool, database connection pool, or logging service.

Ensure a class has only one instance and provide a global point of access to it.

Singleton Design Pattern C# Example

Here’s an example of implementing the Singleton design pattern in C#:

💻 Singleton Class

public class Singleton
{
    private static Singleton instance;
    private static readonly object lockObject = new();

    public static Singleton GetInstance()
    {
        if (instance == null)
        {
            lock (lockObject)
            {
                if (instance == null)
                {
                    instance = new Singleton();
                }
            }
        }
        return instance;
    }

    public void SomeMethod()
    {
        Console.WriteLine("Singleton method called.");
    }
}

💻Program.cs Class: Main Class

using SingletonEXP;

Singleton _SingletonIns01 = Singleton.GetInstance()…