find control parent/child

//*****************************************
//  example use:
//
//  var tb = null as TextBox;
//  tb = FindVisualChild<TextBox>(container as DependencyObject, "tbTrigger");
//***********************************

public static T FindVisualChild<T>(DependencyObject depObj, string objectName) where T : DependencyObject
        {
            if (depObj != null)
            {
                for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
                {
                    DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
                    if (child != null && child is T)
                    {
                        var name = child.ReadLocalValue(NameProperty);

                        if (name.ToString() == objectName)
                            return (T)child;
                    }

                    T childItem = FindVisualChild<T>(child, objectName);
                    if (childItem != null) return childItem;
                }
            }
            return null;
        }

        public static T FindVisualParent<T>(DependencyObject depObj) where T : DependencyObject
        {
            bool IsParentFound = false;
            DependencyObject parent;

            if (depObj != null)
            {
                while (!IsParentFound)
                {
                    parent = VisualTreeHelper.GetParent(depObj);
                    if (parent != null && parent is T)
                    {
                        IsParentFound = true;
                        return (T)parent;
                    }

                    T parentItem = FindVisualParent<T>(parent);
                    if (parentItem != null) return parentItem;
                }
            }
            return null;
        }