دستور شرطی switch در سی شارپ (switch statement)

switch(expression){
    case value :
       //Statements
       break; //optional
    case value :
       //Statements
       break; //optional
    //You can have any number of case statements.
    default : //Optional
       //Statements
}

    int age = 24;

            switch (age) {
            case 18:
                Console.WriteLine(" you are 18");
                break;
            case 19:
                Console.WriteLine("you are 19");
                break;
            case 20:
                Console.WriteLine("you are 20");
                break;
            case 21:
                Console.WriteLine("you are 21");
                break;
            case 22:
                Console.WriteLine("you are 22");
                break;
            case 23:
                Console.WriteLine("you are 23");
                break;
            case 24:
                Console.WriteLine("you are 24");
                break;
            case 25:
                Console.WriteLine("you are 25");
                break;

            default:
                Console.WriteLine("you are not in 18-25");
                break;
            }

 String grade = "C";

            switch (grade) {
            case "A":
                Console.WriteLine("very good");
                break;
            case "B":
                Console.WriteLine("good");
                break;
            case "C":
                Console.WriteLine("bad");
                break;
            case "D":
                Console.WriteLine("very bad");
                break;
            }