C# (CSharp) Week2.Demo.Lib.Day4 ChildClass примеры использования

Пример #1

 public static string MyDescription(this ChildClass instance, string message)
 {
     return($"{message}, {instance.Description()}");
 }

Пример #2

 public static string MyDescription(this ChildClass instance)
 {
     return("Ciao a tutti!");
 }