static void Main(string[] args)
{
Vertebrate v = new Vertebrate();
v.backbone = "AAA";
//we declare a variable
Vertebrate v2 = new Vertebrate();
//v2 = ChangeBackbone(v);
Mammal m = new Mammal();
m.warmBlooded = true;
v2 = ChangeBackbone(m);
Mammal m = new Mammal();
if (m is Mammal)
{
}
//test whether an object is a particular type requires use of the “is” keyword like this
Mammal m2 = (Mammal)v2;
//here we cast the mammal to a vertebrate - see alternative below using "as"
Vertebrate v = new Vertebrate();
Mammal m = v as Mammal;
//To convert between types which are related from each other you can use the “as” keyword which is nicer than the bracket notation
Bird b = new Bird();
b.backbone = "BBB";
b.wingSpan = 5;
v2 = ChangeBackbone(b);
Console.WriteLine(b.backbone);
Console.WriteLine(b.wingSpan);
Console.ReadLine();
}
static Vertebrate ChangeBackbone(Vertebrate ver)
{
ver.backbone = "ABC";
return(ver);
}
