S: RefreshValues method does 5 things

[wli3]

1. Where to fetch the data
   find by code smell hard code string
   https://github.com/ericgu/AnExerciseInCouplingDesRefWG/blob/master/StockTracker/Form1.cs#L36
2. How to fetch the data
   find by code smell keyword new
   https://github.com/ericgu/AnExerciseInCouplingDesRefWG/blob/master/StockTracker/Form1.cs#L39
3. fetch the data Form1 shouldn't contain the logic to fetch stock #3
   https://github.com/ericgu/AnExerciseInCouplingDesRefWG/blob/master/StockTracker/Form1.cs#L40
4. parse the fetch result
   https://github.com/ericgu/AnExerciseInCouplingDesRefWG/blob/master/StockTracker/Form1.cs#L43
5. format the result to human readable
   find by the shape of the code?? 2 obvious separated block
   https://github.com/ericgu/AnExerciseInCouplingDesRefWG/blob/master/StockTracker/Form1.cs#L60

every single concern could be a class