/// <summary>
 /// Adds a header 1 string for <see cref="MdDocument"/> instance
 /// </summary>
 /// <param name="document">Instance of <see cref="MdDocument"/> class</param>
 /// <param name="value">Input string</param>
 /// <param name="args">An array of objects to write using format</param>
 public static void H1(this MdDocument document, string value, params string[] args)
 {
     document.Lines.Add(new Line(Md.H1(string.Format(value, args))));
     document.Lines.Add(new Line());
 }
 /// <summary>
 /// Adds a header 6 string for <see cref="MdDocument"/> instance
 /// </summary>
 /// <param name="document">Instance of <see cref="MdDocument"/> class</param>
 /// <param name="value">Input string</param>
 /// <param name="args">An array of objects to write using format</param>
 public static void H6(this MdDocument document, string value, params string[] args)
 {
     document.Lines.Add(new Line(Md.H6(value)));
     document.Lines.Add(new Line());
 }
 /// <summary>
 /// Adds a line for <see cref="MdDocument"/> instance
 /// </summary>
 /// <param name="document">Instance of <see cref="MdDocument"/> class</param>
 /// <param name="value">Input string</param>
 /// <param name="args">An array of objects to write using format</param>
 public static void WriteLine(this MdDocument document, string value, params string[] args)
 {
     document.Lines.Add(new Line(value, args));
     document.Lines.Add(new Line());
 }