XElement Extensions: InnerXml, GetAttributeValue

XElementExtension.cs

using System;
using System.Text;
using System.Xml.Linq;

public static class XElementExtension
{
    public static string InnerXml(this XContainer element)
    {
        var innerXml = new StringBuilder();

        // append node's xml string to innerXml
        foreach (XNode node in element.Nodes())
            innerXml.Append(node.ToString());
            
        return innerXml.ToString();
    }

    public static XElement InnerElement(this XContainer element)
    {
        return XElement.Parse(InnerXml(element), LoadOptions.None);
    }

    public static string GetAttributeValue(this XElement element, string attributeName)
    {
        // if (string.isNullOrEmpty(attributeName))
        //    return null;
            
        var attribute = element.Attribute(attributeName);
        return attribute == null ? null : attribute.Value;
    }

}