In wpf can traverse through VisualTree using VisualTreeHelper class to find the controls. Here is the example to find all the checkboxes inside a control using VisualTreeHelper class.

C# code (wpf)
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 for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parentcontrol); i++)

                {

                    var checkBox = VisualTreeHelper.GetChild(parentControl, i) as CheckBox;

                    if (checkBox != null)

                    {

                        // do task for the checkbox.

                    }

                }