With my other question: http://stackoverflow.com/questions/1672750/c-showing-multiple-xml-data-entires-with-the-same-node-value
I have one more question, in the part:
XmlNodeList allNodes = doc.SelectNodes("/Lessons/Lesson[Date='01/01/2010']");
Is there a way to put a string with a value in it (that I already have setup) in the part '01/01/2010'?