<s>[INST] Here is a C# class with two methods, each containing recursive calls. It's coded to calculate the sum of the elements at specified indexes (actually it should sum all indexes for which some other indexes are greater in this list, but that is for later). The class has all constant values as fields and the name of the class (RecursionExp) is also part of the static values, but in order to keep the example smaller I kept it that way. It would be more correct to put it in a separate file. 

This class has a method (Do) that starts the "recursion" with its own index and index in inner list and starts a chain of recursive calls (goDeep Outer and inner calls) and then jumps back.

Here is code for it:
```csharp
 public class RecursionExp {
   List<int> _list = new List<int> { 5, 10, 15, 6, 1 };
   public int sum = 0;

   public void Do() {
       int m = 0;
       for (int i = 0; i < _list.Count; i++) {
           m = _list[i];
           if (_list[i] < 10) {
               if (m > 2) {
                   sum += _list[i];
               }
               GoDeeper(i, 0);
           }
       }
   }

   public void GoDeeper(int currentOuterIndex, int currentInnerIndex) {
       sum += _list[currentOuterIndex] + _list[currentInnerIndex];
       GoDeeper(currentOuterIndex, currentInnerIndex + 1);
   }
```

If we were to create an iterative version of that code, what would it be?[/INST]