How to write the new Switch Expression in C# 8.0?

The switch expression provides for switch-like semantics in an expression context

switch is a selection statement that chooses a single switch section to execute from a list of candidates based on a pattern match with the match expression.

The switch statement is often used as an alternative to an if-else construct if a single expression is tested against three or more conditions.

Example

New way of Writing the Switch

var message = c switch{
   Fruits.Red => "The Fruits is red",
   Fruits.Green => "The Fruits is green",
   Fruits.Blue => "The Fruits is blue"
};

Example 1

class Program{
   public enum Fruits { Red, Green, Blue }
   public static void Main(){
      Fruits c = (Fruits)(new Random()).Next(0, 3);
      switch (c){
         case Fruits.Red:
            Console.WriteLine("The Fruits is red");
            break;
         case Fruits.Green:
            Console.WriteLine("The Fruits is green");
            break;
         case Fruits.Blue:
            Console.WriteLine("The Fruits is blue");
            break;
         default:
            Console.WriteLine("The Fruits is unknown.");
            break;
      }
      var message = c switch{
         Fruits.Red => "The Fruits is red",
         Fruits.Green => "The Fruits is green",
         Fruits.Blue => "The Fruits is blue"
      };
      System.Console.WriteLine(message);
      Console.ReadLine();
   }
}

Output

The Fruits is green
The Fruits is green

Nizamuddin Siddiqui

Updated on 19-Aug-2020 14:08:02

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