Does the foreach loop in C# guarantee an order of evaluation?

Question

Logically, one would think that the foreach loop in C# would evaluate in the same order as an incrementing for loop. Experimentally, it does. However, there appears to be no

Answer 1

For what it's worth, you can look up a lot of this in Reflector. In mscorlib, System.Array implements IEnumerable (as mentioned), and Array#GetEnumerator returns an ArrayEnumerator. Here's the body of ArrayEnumerator#MoveNext:

public bool MoveNext()
{
    if (this._complete)
    {
        this.index = this.endIndex;
        return false;
    }
    this.index++;
    this.IncArray();
    return !this._complete;
}

That's obviously one example, but the answer is: it's up to the implementer and you can find out most of the way they work experimentally, or by inspecting the source, in some cases.