C# Класс Simplexcel.XlsxInternal.XlsxWriter.XlsxWriterInternal

This does the actual writing by manually creating the XML according to ECMA-376, 3rd Edition, Part 1's SpreadsheetML. Due to the way state is handled, Save() can only be called once, hence it's a private class around an internal static member that initialized it anew on every Save(Workbook) Note that in many cases, the order of elements in an XML file matters!