public static IEnumerable <Control> Flatten(this ControlCollection controls)
{
List <Control> list = new List <Control>();
controls.Traverse(c => list.Add(c));
return(list);
}
public static IEnumerable <Control> Flatten(
this ControlCollection controls,
Func <Control, bool> predicate)
{
List <Control> list = new List <Control>();
controls.Traverse(c => { if (predicate(c))
{
list.Add(c);
}
});
return(list);
}