What is the implementation method of C# delegates?

There are several ways to implement C# delegates, such as:

1. Use naming conventions: Define a method and then pass the name of that method as a parameter to the delegate instance.

public delegate void MyDelegate(string message);

public class MyClass
{
    public static void PrintMessage(string message)
    {
        Console.WriteLine(message);
    }
    
    public static void Main()
    {
        MyDelegate myDelegate = PrintMessage;
        myDelegate("Hello World");
    }
}

1. Use an anonymous method: Define an anonymous method directly in the parameter position of the delegate.

public delegate void MyDelegate(string message);

public class MyClass
{
    public static void Main()
    {
        MyDelegate myDelegate = delegate (string message)
        {
            Console.WriteLine(message);
        };
        
        myDelegate("Hello World");
    }
}

1. Using Lambda expressions: Lambda expressions can be used to more concisely define anonymous methods.

public delegate void MyDelegate(string message);

public class MyClass
{
    public static void Main()
    {
        MyDelegate myDelegate = (message) =>
        {
            Console.WriteLine(message);
        };
        
        myDelegate("Hello World");
    }
}

Regardless of the method used, delegation can be used to reference methods and allows for methods to be dynamically replaced at runtime.