XML based comments

   
  
using System;

/// <summary>
/// Main method.
/// <para>This sample is useless.</para>
/// </summary>
class SayHello {
    /// <summary>
    /// This is the Main method for the class and is
    /// the execution starting point for our application.
    /// Please note that <paramref name="args">args</paramref>
    /// is a array of strings.
    /// </summary>
    /// <param name="args">params for Main method</param>
    /// <returns>Returns a value depending on how the program
    /// was called.</returns>
    //We want Main to return an integer.
    public static int Main(string[] args) {
        if (args.Length > 0) {
            return (0);
        }
        return (1);
    }
}