StackOverflowException when using XamlWriter.Save() when trying to Clone a User Control

Question

I am using the below method to attempt to clone a TreeViewItem, but once it hits the XamlWriter.Save() it gives me a StackOverflowException.

The code that triggered this is :

 var b = Clone<TreeViewItem>(ViewTree.ItemContainerGenerator.ContainerFromIndex(0) as TreeViewItem);

Where ViewTree is the name of my TreeView.

 public static T Clone<T>(T from) {
    string objStr = System.Windows.Markup.XamlWriter.Save(from);
    System.IO.StringReader stringReader = new System.IO.StringReader(objStr);
    System.Xml.XmlReader xmlReader = System.Xml.XmlReader.Create(stringReader);
    object clone = System.Windows.Markup.XamlReader.Load(xmlReader);

    return (T)clone;
 }

Answer 1

Check if this TreeView has some cycle in it. For example: Some treeview node (or children of it children) has a child that point to the parent node. The StackOverflowException is generally for recursions out of memory.

Answer 2

This works for me:

 System.Xaml.XamlServices.Save(obj);

from System.Xaml.dll

It handles circular references properly.