how we can set value for xml element using XmlDocument class
If you know how to select a value, then you probably know how to update one too.
XmlDocument doc = new XmlDocument();doc.Load(...);XmlNamespaceManager nsMgr = new XmlNamespaceManager(doc.NameTable);nsMgr.AddNamespace("v9", "http://fedex.com/ws/ship/v9");XmlNode severityNode = doc.SelectSingleNode("//v9:Severity", nsMgr);severityNode.innerText = "FAILURE";The important thing to know is that the <v9:Severity> node has an inner text() node, so in the example above you can't use the Node.Value property. To do that you would do something like this instead:
XmlNode severityTextNode = doc.SelectSingleNode("//v9:Severity/text()", nsMgr);severityTextNode.Value = "FAILURE";Note the subtle differences.