New Post: Question about Themes in ClosedXML

I noticed that the XML theme document generated by ClosedXML is "theme.xml", but the standard theme file name for OpenXML is "theme1.xml".

This generates a file that is still valid in Excel, but has given me problems elsewhere, mainly in a custom app that parses these XML files and looks specifically for "theme1.xml".

Any idea why it's designed this way?