[Solved]-How can I query all Childcontrols of a Winform recursively?-LINQ,C#

may be this will help you...

how can i get all controls from a form including controls in any container?

once you have the list you can query'em

something like this should work (not perfect code by any means...just meant to get the idea across):

public ienumerable<control> getselfandchildrenrecursive(control parent)
{
    list<control> controls = new list<control>();

    foreach(control child in parent.controls)
    {
        controls.addrange(getselfandchildrenrecursive(child));
    }

    controls.add(parent);

    return controls;
}

var result = getselfandchildrenrecursive(toplevelcontrol)
    .where(c => c is textbox || c is checkbox);