I found a problem when I try to apply FirstLineIndent style to a paragraph.
When the "Nomal" builtinStyle of the template doc file is not 0f,forexample, 30f, then add a new paragraph,
I can't set FirstLineIndent style to 0f or 60f. It does't work.
But if "Nomal" builtinStyle of the template doc file is 0f , It works well.
Document doc = new Document();
doc.LoadFromFile("Sample.docx");
Section s = doc.AddSection();
Paragraph Paras = s.AddParagraph();
Paras.AppendText("News Line Sample");
Paras.Format.FirstLineIndent = 0F;
doc.SaveToFile("result.docx", FileFormat.Docx);
System.Diagnostics.Process.Start("result.docx");