working pattern of yield return

Question

When i have a code block

static void Main()
{

  foreach (int i in YieldDemo.SupplyIntegers())
  {
    Console.WriteLine(\"{0} is consumed by foreach iteration\         


        

Answer 1

in short, (while yr waiting for marc's long-hand version) when the compiler sees yield statements, behind the scenes it builds a new instance of a custom class for you that implements an interface called IEnumerator, which has methods Current(), and MoveNext(), and keeps track of where you are currently in the iteration process... In the case above as your example, it would also keep track of the values in the list to be enumerated through.