Add functionality to the application so that the user can also save and read the weather data
out as an XML file. After this the two file formats the application will support will be CSV
and XML.
a. You must use XML serialization for this requirement.
b. You may assume that first time the program loads a file it will be a CSV file, and
then you should be able to save and load an XML file in the format that your program
can handle.