C#: Interfaces Cheat Sheet

// interface interface Animal 
{ 
  void animalSound(); // interface method (does not have a body) 
  void run(); // interface method (does not have a body) 
}

Example

interface IAnimal 
{
  void animalSound(); 
}
class Dog : IAnimal 
{
  public void animalSound() 
  {
    Console.WriteLine("The dog says: woof woof");
  }
}
class Program 
{
  static void Main(string[] args) 
  {
    Dog myDog = new Dog();
    myDog.animalSound();
  }
}

=> output:

The dog says: woof woof