<%@ WebService Language="C#" class="Fibonacci"%>

using System.Web.Services;
using System.EnterpriseServices;

public class Fibonacci : WebService
{
  [WebMethod(TransactionOption=TransactionOption.RequiresNew)]
  public int GetSeqNumber(int fibIndex){

	if (fibIndex < 2)
	  return fibIndex;

	int[] FibArray = {0,1};

	for (int i = 1; i< fibIndex; i++){
	  FibArray[1] = FibArray[0] + FibArray[1];
	  FibArray[0] = FibArray[1] - FibArray[0];
	}

	return FibArray[1];
  }
}