I tried following code block to apply style to paragraph which is hierarchically correct but its not working in intended way.
Paragraph paragraph = new Paragraph();
ParagraphProperties paragraphProperties = new ParagraphProperties();
paragraphProperties.Append(new ParagraphStyleId() { Val = "Title" });
paragraph.Append(paragraphProperties);
So help me out to apply styles to paragraphs programmatically. And still I am in learning phase, So need good documentation as well.