var a = new List<aDrivingCursor>();
//execute stored proc 1
sp.Execute(out aDrivingCursor);

var b = new List<bDrivingCursor>();
//execute stored proc 2
sp2.Execute(out bDrivingCursor);

foreach (var temp in aDrivingCursor)
{

  int areaId = 0
  if (b.Any(s => s.Address1 == temp.Address1))
  {
    //This is where I'm having problem with
    areaId = Int32.Parse(b.Where(s => s.Address1 ==a.Address1).FirstOrDefault().Select(o => o.AreaId));

  }
}

class aDrivingCursor
{
    public int Address1 { get; set; }
}

class bDrivingCursor
{
    public int AreaId { get; set; }
 }