switch(shape)

{

    case Circle c:

        WriteLine($"circle with radius {c.Radius}");

        break;

    case Rectangle s when (s.Length == s.Height):

        WriteLine($"{s.Length} x {s.Height} square");

        break;

    case Rectangle r:

        WriteLine($"{r.Length} x {r.Height} rectangle");

        break;

    default:

        WriteLine("<unknown shape>");

        break;

    case null:

        throw new ArgumentNullException(nameof(shape));

}

​

​

string commandName = "start";

​

switch (commandName)

{

    case "start":

        Console.WriteLine("Starting service...");

        StartService();

        break;

    case "stop":

        Console.WriteLine("Stopping service...");

        StopService();

        break;

    default:

        Console.WriteLine(String.Format("Unknown command: {0}", commandName));

        break;

}

public static NewSwitch FromRainbow(Color color) =>

color switch

{

    Color.Red    => new NewSwitch(0xFF, 0x00, 0x00),

    Color.Orange => new NewSwitch(0xFF, 0x7F, 0x00),

    Color.Yellow => new NewSwitch(0xFF, 0xFF, 0x00),

    Color.Green  => new NewSwitch(0x00, 0xFF, 0x00),

    Color.Blue   => new NewSwitch(0x00, 0x00, 0xFF),

    Color.Indigo => new NewSwitch(0x4B, 0x00, 0x82),

    Color.Violet => new NewSwitch(0x94, 0x00, 0xD3),

    _              => throw new ArgumentException(message: "invalid color", paramName: nameof(color)),

};

// switch..case with string

void StringSwitchCase()

{

   string name = "Mahesh";

   switch (name)

   {

   case "Mahesh":

      Console.WriteLine("First name was used!");

   break;

   case "Chand":

      Console.WriteLine("Last name was used!");

   break;

   default:

      Console.WriteLine("No name found!");

   break;

   }

}

using System;

​

public class Example

{

   public static void Main()

   {

      int caseSwitch = 1;

​

      switch (caseSwitch)

      {

          case 1:

              Console.WriteLine("Case 1");

              break;

          case 2:

              Console.WriteLine("Case 2");

              break;

          default:

              Console.WriteLine("Default case");

              break;

      }

   }

}

// The example displays the following output:

//       Case 1

// switch..case with enum

void WeekEndOrWeekDay()

{

   switch (DateTime.Now.DayOfWeek)

   {

   case DayOfWeek.Saturday:

   case DayOfWeek.Sunday:

      Console.WriteLine("Today is Weekend");

   break;

   default:

      Console.WriteLine("Today is a work day.");

   break;

   }

}

switch (caseSwitch)

{

   case 1:

      Console.WriteLine("Case 1");

      DateTime date = DateTime.Today;

      Console.WriteLine("Today's date is {0}", date);

      if (date.Day == 2)

      {

         Console.WriteLine("This is the shortest month");

      }

   break;

   case 2:

      Console.WriteLine("Case 2");

   break;

   case 3:

      Console.WriteLine("Case 3");

   break;

   default:

      Console.WriteLine("Default case");

   break;

}

switch(expression) {

  case x:

    // code block

    break;

  case y:

    // code block

    break;

  default:

    // code block

    break;

}

// Generate a random value between 1 and 9

int caseSwitch = new Random().Next(1, 9);

switch (caseSwitch)

{

   case 1:

      Console.WriteLine("Case 1");

   break;

   case 2:

      Console.WriteLine("Case 2");

   break;

   case 3:

      Console.WriteLine("Case 3");

   break;

   default:

      Console.WriteLine("Value didn't match earlier.");

   break;

}

int number = 2;

​

switch(number)

{

    case 1:

        Console.WriteLine("Number is 1");

        break;

    case 2:

        Console.WriteLine("Number is 2");

        break;

}

Console.WriteLine(GetDay(5));

Console.ReadLine();

​

​

static string GetDay(int dayNum)

{

    string dayName;

​

    switch (dayNum)

    {

        case 0:

            dayName = "Sunday";

                break;

       case 1:

            dayName = "Monday";

            break;

       case 2:

            dayName = "Tuesday";

            break;

        case 3:

            dayName = "Wednesday";

            break;

        case 4:

            dayName = "Thursday";

            break;

        case 5:

            dayName = "Friday";

            break;

        case 6: dayName = "Saturday";

                break;

        default:

            dayName = "Invalid Day Number";

            break;

    }

​

    return dayName;

​

}