Solve this problem by writing data to an existing XML file without overwriting the existing content of the file.

=============== Problem description ====================

You need to write data to an existing XML document. I use the xmlserializer serialization method to write data to an XML file, but the data will overwrite the existing content of the file, what I want is to write data to an XML file, but the original content will not be overwritten. I hope you can solve this problem. Please.

============= Solution 1 ======================

Fileoutputstream (string path, Boolean append), the second parameter is to set whether to add to the end of the file, that is, not overwrite

Solve this problem by writing data to an existing XML file without overwriting the existing content of the file.