static void Test4(Shapev2 shape)
{
// Azonnal készítünk egy változót, ha igaz
if (shape is Circlev2 circle)
{
Console.WriteLine(circle.CalculateArea() * 2);
}
else
{
Console.WriteLine(shape.CalculateArea());
}
}
static void Test3(Shapev2 shape)
{
if (shape is Circlev2)
{
var circle = (Circlev2)shape; // Biztos jó
Console.WriteLine(circle.CalculateArea() * 2);
}
else
{
Console.WriteLine(shape.CalculateArea());
}
}
static void Test5(Shapev2 shape)
{
switch (shape)
{
case Circlev2 circle:
Console.WriteLine(circle.CalculateArea() * 2);
break;
case Rectanglev2 rectangle:
Console.WriteLine(rectangle.CalculateArea() * 3);
break;
default:
Console.WriteLine(shape.CalculateArea());
break;
}
}
static void Test2(Shapev2 shape)
{
// null, ha nem sikerül
var circle = shape as Circlev2;
}
static void Test1(Shapev2 shape)
{
var circle = (Circlev2)shape;
}
