public static void ExampleCode1()
{
Scooter scooter = new Scooter();
Car car = scooter;
Rectangle rectangle = new Rectangle();
rectangle.Colour = "red";
Console.WriteLine("Object is {0} and colour is {1}", rectangle.GetType().Name, rectangle.Colour);
Shape shape = rectangle;
Console.WriteLine("Object is {0} and colour is {1}", shape.GetType().Name, shape.Colour);
// Rectangle r2 = (Rectangle)new Shape(); // this conversion will fail since a Shape can't be converted into a Rectangle (more specialized typed)
bool randBool = new Random().Next() % 2 == 0;
Console.WriteLine("Bool = {0}", randBool);
Shape s2;
if (randBool)
{
s2 = new Rectangle();
}
else
{
s2 = new Shape();
}
Rectangle r2 = null;
if (s2 is Rectangle) // this will work
{
r2 = (Rectangle)s2;
}
if (r2 != null)
{
Console.WriteLine("Shape into Rectangle");
}
else
{
Console.WriteLine("Conversion was not allowed");
}
r2 = s2 as Rectangle; // the 'as' will try to convert it, if it can't then it returns null
if (r2 != null)
{
Console.WriteLine("Shape into Rectangle");
}
else
{
Console.WriteLine("Conversion was not allowed");
}
}