Linq Fetch all controls (ordered)

Question

Is there a way to fetch all the control using linq.

What I'll like to do is something like that (order the control by tab index) :

foreach (Control control in this.Controls.OrderBy(c => c.TabIndex)
{
    ...
}

I use that kind of query when I got a List<...>

I use c# and .Net 3.5

Answer 1

ControlCollection only implements IEnumerable, not IEnumerable<T>. That's easy to fix though - add a call to Cast():

foreach (Control control in Controls.Cast<Control>()
                                    .OrderBy(c => c.TabIndex))
{
}

Or you could use a query expression, which will call Cast() where necessary:

var controls = from Control c in Controls
               orderby c.TabIndex
               select c;

foreach (Control control in controls)
{
}