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

It's just a syntax sugar, .net generates IEnumerator class for you and implements MoveNext, Current and Reset methods, than generates IEnumarable class GetEnumerator of which returns that IEnumerator, you can see that magic classes by .net reflector or ildasm.

Also see here