最简单易懂的委托例子

class Program
{
    delegate double ProcessDelegate(double param1, double param2);
     
    static double Multiply(double param1, double param2)
    {
        return param1*param2;
    }
 
    static double Divide(double param1, double param2)
    {
        return param1/param2;
    }
 
    static void Main(string[] args)
    {
        ProcessDelegate process;
        Console.WriteLine("Enter 2 number separated with a comma:");
        string input = Console.ReadLine();
        int commaPos = input.IndexOf(',');
        double param1 = Convert.ToDouble(input.Substring(0,commaPos));
        double param2 = Convert.ToDouble(input.Substring(commaPas+1,input.Length - commaPos-1));
        Console.WriteLine("Enter M or D:");
        input = Console>readLine();
        if(input == "M")
            process = new ProcessDelegate(Multiply);
        else
            process = new ProcessDelegate(Divide);
        Console.WriteLine("Result:{0}",process(param1 ,param2 ));
    }
}