XObjectExtensions.cs

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using System.Xml.Linq;
 
namespace System.Xml.XPath;
 
internal static class XObjectExtensions
{
    public static XContainer GetParent(this XObject obj)
    {
        XContainer xContainer = obj.Parent;
        if (xContainer == null)
        {
            xContainer = obj.Document;
        }
        if (xContainer == obj)
        {
            return null;
        }
        return xContainer;
    }
}