C#: Switch Statement Cheat Sheet

switch(expression) {
   case constant-expression1  :
      statement(s);
      break;
   case constant-expression2  :
   case constant-expression3  :
      statement(s);
      break;
  
   /* you can have any number of case statements */
   default : /* Optional */
   statement(s);
}

Example

using System;

namespace DecisionMaking {
   class Program {
      static void Main(string[] args) {
         /* local variable definition */
         char grade = 'B';
         
         switch (grade) {
            case 'A':
               Console.WriteLine("Excellent!");
               break;
            case 'B':
            case 'C':
               Console.WriteLine("Well done");
               break;
            case 'D':
               Console.WriteLine("You passed");
               break;
            case 'F':
               Console.WriteLine("Better try again");
               break;
               default:
            Console.WriteLine("Invalid grade");
               break;
         }
         Console.WriteLine("Your grade is  {0}", grade);
         Console.ReadLine();
      }
   }
}

=> output

Well done
Your grade is B