I am working in a clone of the CustomRegistration web part and after the user is registered I do some work to add them to a third party Email Marketing firm we are using. When the code completes, I wanted to write an EventLog entry that has a description with some of the information returned from the third party service...I created an instance of EventProvider and called LogEvent like this:

eventLog.LogEvent("I", DateTime.Now, "Registration", "Constant Contact Update", string.Empty, "User Details BEFORE Update: " + detailsXml);

detailsXml is a string that contains the XML details of the user's record in our third part service (Constant Contact). It should help me in debugging if there are issues so I wanted to store it in the description. Am I missing something here?