Remove empty XML tags

Question

I am looking for a good approach that can remove empty tags from XML efficiently. What do you recommend? Regex? XDocument? XmlTextReader?

For example,

Answer 1

XmlTextReader is preferable if we are talking about performance (it provides fast, forward-only access to XML). You can determine if tag is empty using XmlReader.IsEmptyElement property.

XDocument approach which produces desired output:

public static bool IsEmpty(XElement n)
{
    return n.IsEmpty 
        || (string.IsNullOrEmpty(n.Value) 
            && (!n.HasElements || n.Elements().All(IsEmpty)));
}

var doc = XDocument.Parse(original);
var emptyNodes = doc.Descendants().Where(IsEmpty);
foreach (var emptyNode in emptyNodes.ToArray())
{
    emptyNode.Remove();
}