Multicast Delegates

A delegate that points to multiple methods is called a multicast delegate. The + operator adds a function to the delegate object and the - operator removes an existing function from a delegate object.
When the multicast delegate is called, it invokes the delegates in the list, in order. Only delegates of the same type can be combined.

namespace Delegates 
{ 
    delegate void ArithmeticOperation(double operand1, double operand2); 

    class Program 
    { 
        static void Addition(double number1, double number2) 
        { 
            System.Console.WriteLine($"{number1} + {number2} = {number1 + number2}"); 
        } 

        static void Subtraction(double number1, double number2) 
        { 
            System.Console.WriteLine($"{number1} - {number2} = {number1 - number2}"); 
        } 

        static void Multiplication(double number1, double number2) 
        { 
            System.Console.WriteLine($"{number1} * {number2} = {number1 * number2}"); 
        } 

        static void Division(double number1, double number2) 
        { 
            System.Console.WriteLine($"{number1} / {number2} = {number1 / number2}"); 
        } 

        static void Main(string[] args) 
        { 
            ArithmeticOperation operations = Addition; 
            operations += Subtraction; 
            operations += Multiplication; 
            operations += Division; 
            operations(10, 5); 
            System.Console.WriteLine(); 
        } 
    } 
}