/// <summary>
/// Gets the XML attribute from the specified XmlNode.
/// </summary>
/// <param name="node">The XmlNode containing the attribute you want.</param>
/// <param name="attributeName">The attribute name.</param>
/// <returns>The xml attribute value.</returns>
/// <exception cref="XmlException">There was an error parsing the XmlNode.</exception>
public static string GetXmlAttribute(XmlNode node, string attributeName)
{
ThrowIf.ArgumentNull(node, nameof(node));
ThrowIf.StringIsNullOrWhiteSpace(attributeName, nameof(attributeName));
if (node.Attributes?[attributeName] == null)
{
throw new XmlException(StringUtils.FormatInvariant("No XML attribute named '{0}' was found!", attributeName));
}
return(node.Attributes[attributeName].Value);
}