Switch is a selection statement that chooses a switch case section depending on the value matched with the expression/value being evaluated.<sup>1</sup> If none of the case statements match the value of the switched variable, the default path is chosen. The switch statement is like a set of `if statements`. We exit from the switch by `break`.
## Example
```
public enum Colors { Red, Blue, Green, Orange }
Colors myColor;
... myColor is set to one of the enum values ...
switch(myColor){
case Colors.Red:
Console.WriteLine("How you like them apples?");
break;
case Colors.Blue:
Console.WriteLine("Ice Ice Baby...");
break;
case Colors.Green:
Console.WriteLine("Fore!");
break;
default:
Console.WriteLine("I have a hard time when I try to rhyme.");
Starting with C# 7.0 you can use `when` clause to specify additional condition that must be satisfied. When clause is optional and is used right after specific case.
```csharp
Dog dog = new Dog
{
Name = "Charlie",
Breed = "Affenpinscher",
Age = 3
};
switch (dog)
{
case Dog d when d.Breed == "Affenpinscher" && d.Age >= 6:
Console.WriteLine($"{dog.Name} is considered a senior dog.");
break;
case Dog d when d.Breed == "Affenpinscher" && d.Age >= 2:
Console.WriteLine($"{dog.Name} is considered an adult dog.");
break;
case Dog d when d.Breed == "Affenpinscher":
Console.WriteLine($"{dog.Name} is considered a puppy.");
break;
case Dog d when d.Breed == "Chihuahua" && d.Age >= 4:
Console.WriteLine($"{dog.Name} is considered a senior dog.");
break;
case Dog d when d.Breed == "Chihuahua" && d.Age >= 2:
Console.WriteLine($"{dog.Name} is considered an adult dog.");
break;
case Dog d when d.Breed == "Chihuahua":
Console.WriteLine($"{dog.Name} is considered a puppy.");
break;
default:
Console.WriteLine($"We have no information according {dog.Breed} breed.");
break;
}
```
As you see in the above example after `when` keyword you should specify logical condition (an instruction that returns bool value).