XNodeDocumentOrderComparer.cs

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using System.Collections;
using System.Collections.Generic;
 
namespace System.Xml.Linq;
 
public sealed class XNodeDocumentOrderComparer : IComparer, IComparer<XNode?>
{
    public int Compare(XNode? x, XNode? y)
    {
        return XNode.CompareDocumentOrder(x, y);
    }
 
    int IComparer.Compare(object x, object y)
    {
        XNode xNode = x as XNode;
        if (xNode == null && x != null)
        {
            throw new ArgumentException(System.SR.Format(System.SR.Argument_MustBeDerivedFrom, typeof(XNode)), "x");
        }
        XNode xNode2 = y as XNode;
        if (xNode2 == null && y != null)
        {
            throw new ArgumentException(System.SR.Format(System.SR.Argument_MustBeDerivedFrom, typeof(XNode)), "y");
        }
        return Compare(xNode, xNode2);
    }
}