/*
The (type) notation has two semantics with the same syntax.
The first is for type casting and second is for unboxing.
*/


double a = 2.3;
object b = (object) a;
double c = (double) b;     // ok

double x = 4.2;
object y = (object) x;
int z = (int)y;            // System.InvalidCastException on unboxing.