What will be the output of the following C# code?
class box
{
public int volume;
int width;
int height;
int length;
public box ( int w, int h, int l)
{
this.width = w;
this.height = h;
this.length = l;
}
~ box()
{
volume = this.width * this.length * this.height;
console.writeline(volume);
}
}
class Program
{
public static void Main(string[] args)
{
box b = new box(4, 5, 9);
Console.ReadLine();
}
}
a) 0
b) Code executes successfully but prints nothing
c) Compile time error
d) 180

Answer: d
Explanation:
Output:
180.