This is equivalent to ask "how to change the version from 1.0 to 1.1", because there are only those two XML versions, hence I will propose a duplicate for that below.
– Pac0Aug 24 '20 at 20:03
3
Does this answer your question? [Does .Net 4.5 support XML 1.1 yet (for characters invalid in XML 1.0)?](https://stackoverflow.com/questions/17231675/does-net-4-5-support-xml-1-1-yet-for-characters-invalid-in-xml-1-0)
– Pac0Aug 24 '20 at 20:03