public class Program

{

    public static void Main()

    {

        Animal dog = new Animal();

        Animal.Save(dog);

    }

}

​

    class Animal

    {

        public static void Save<T>(T target) where T : Animal, new()

        {

            /*

                A generic class can have restrictions (aka constraints) 

                via the WHERE contextual keyword

​

                If a consumer attempts to instantiate the class

                and attempts to use a type that is not permitted 

                (by a constraint) a compile-time error is generated

             */

        }

    }