Code :
var doc = new Document(filename);
doc.Save(fileout, SaveFormat.Markdown);
Error stack :
System.NullReferenceException: Object reference not set to an instance of an Object.
at #=zFz9$AL7bjxwHUuimODfFc8swDug…...NullReferenceExcepti: Object reference not set to an instance of an object. at...