Question

how to remove an attribute from an System.Xml.XmlNode object in C#. The Code I tried did not work. It throw an exception “node to be removed is not valid child node”

foreach (XmlNode distribution 
         in responseXml.SelectNodes("/Distributions/Distribution/DistributionID"))
{
  XmlAttribute attribute = null;
  foreach (XmlAttribute attri in distribution.Attributes)
  {
    if (attri.Name == "GrossRevenue")
      attribute = attri;
  }
  if (attribute != null) 
    distribution.ParentNode.RemoveChild(attribute);
}

Answer 1

XmlAttributes are not XmlNodes. XmlNode.ChildNodes is of type XmlNodeList, while XmlNode.Attributes is of type XmlAttributesCollection. To remove an attribute, you use the XmlAttributesCollection.Remove or .RemoveAt method. In your code:

distribution.ParentNode.Attributes.Remove(attribute);