Value type and reference type problem

Question

Hi I\'m trying to do a simple swap of two objects.My code is

void Main()
{
  object First = 5;
  object Second = 10;

  Swap(First, Second);
  //If I display res         


        

Answer 1

The object pointed to by the parameters inside the Swap method are references to the First and Second objects inside Main, but the parameters themselves are local to the Swap method.

So if you inside Swap had written First = 1; Second = 2;, you would have seen the change in the objects inside Main. However, you only change what the paremeters to Swap point to (by assigning them to another object), and do not change the objects at all. The same would be true if you tried setting the objects to null inside the Swap method.