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) { }