สำรวจตัวแทนและแลมบ์ดา

using System;

class Program {
    // Define a delegate
    public delegate void PrintDelegate(string message);

    static void Main() {
        PrintDelegate print = PrintMessage; // Assign method to delegate
        print("Hello, Delegates!"); // Call the method via the delegate
    }

    static void PrintMessage(string message) {
        Console.WriteLine(message);
    }
}

using System;

class Program {
    public delegate int MathOperation(int x, int y);

    static void Main() {
        MathOperation add = (x, y) => x + y; // Lambda for addition
        Console.WriteLine("Result: " + add(10, 20)); // Outputs: Result: 30
    }
}

using System;

class Program {
    public delegate void Notify(string message);

    static void Main() {
        Notify notify = PrintMessage;
        notify += LogMessage;

        notify("Hello, Multicast Delegates!"); // Calls both methods
    }

    static void PrintMessage(string message) {
        Console.WriteLine("Print: " + message);
    }

    static void LogMessage(string message) {
        Console.WriteLine("Log: " + message);
    }
}

using System;

class Program {
    public delegate string StringOperation(string input);

    static void Main() {
        StringOperation operations = ToUpperCase;
        operations += ReverseString;

        string input = "Hello";
        foreach (var operation in operations.GetInvocationList()) {
            Console.WriteLine(((StringOperation)operation)(input));
        }
    }

    static string ToUpperCase(string input) {
        return input.ToUpper();
    }

    static string ReverseString(string input) {
        char[] chars = input.ToCharArray();
        Array.Reverse(chars);
        return new string(chars);
    }
}