Modification to C# XML parsing function

I have a function that parses an XML file. I need the function updated to parse out the tracking numbers and package IDs and put the into the List trackingNumbersAndPackageIDs. Each Package object has a Reference5 value that is the ID of the package. The TrackingNumbers list are the tracking numbers that go with the package IDs. They are both sorted in the same order. I need the trackingNumbersAndPackageIDs list populated with the Reference5 values and the TrackingNumbers that go with them. private static void ProcessOutFile(string outFile, XmlDocument doc) { List trackingNumbersAndPackageIDs = new List(); string invoice = [login to view URL](outFile); var trackingNumbers = [login to view URL](doc, "//TrackingNumbers/TrackingNumber"); if ([login to view URL] > 0) { [login to view URL]("I found these tracking numbers:", trackingNumbers); } else { [login to view URL]("The file {0} didn't have any 'TrackingNumber' elements in it!\n", outFile); } var merchandiseDescriptions = [login to view URL](doc, "//MerchandiseDescription"); if ([login to view URL] > 0) { [login to view URL]("I found these merchandise numbers:", merchandiseDescriptions); } else { [login to view URL]("The file {0} didn't have any 'MerchandiseDescription' elements in it!\n", outFile); } for (int i = 0; i < [login to view URL] && i < [login to view URL]; i++) { if (i >= [login to view URL]) { [login to view URL]("Tracking# is not available for package {0}", i + 1); } else { var merchandiseDescription = merchandiseDescriptions[i]; string[] values = [login to view URL](' '); [login to view URL]("Sending to website script."); var post = [login to view URL]("track={0}&id={1}&invoice={2}", trackingNumbers[i], 9991, invoice); for (int j = 0; j < ([login to view URL]() / 2); ++j) post += [login to view URL]("&quan{2}={0}&sku{2}={1}", values[j + j], values[j + j + 1], j); [login to view URL](post); const string url = "[login to view URL]"; //var content = [login to view URL](url, post); } } }