Question

Take a look at WordprocessingDocument class in the DocumentFormat.OpenXml.Packaging I saw the Create method that receive as parameter a string path and a type that are a WordProcessingDocumentType.

WordProcessingDocumentType

public enum WordprocessingDocumentType
{
    // Summary:
    //     Word Document (*.docx).
    Document = 0,
    //
    // Summary:
    //     Word Template (*.dotx).
    Template = 1,
    //
    // Summary:
    //     Word Macro-Enabled Document (*.docm).
    MacroEnabledDocument = 2,
    //
    // Summary:
    //     Word Macro-Enabled Template (*.dotm).
    MacroEnabledTemplate = 3,
} 

So, I can’t build a .doc file, or put some compatibility with the Word 97-2003 as .doc format ?

Answer 1

No, pre 2007 doesn’t use the openxml file format.