For-loop and DateTime Problem

Question

I'm trying to make use for on a DateTime like this:

for (DateTime d = _BookedCheckIn; d <= _BookedCheckOut; d.AddDays(1))
{
    // ...
}

But the problem is that d does not increase. Does anyone have an idea of what the problem is?

Answer 1

You need to use:

for (DateTime d = _BookedCheckIn; d <= _BookedCheckOut; d = d.AddDays(1))
{

When you call d.AddDays, it's returning a new DateTime, not changing the one you already created.