[C#]Command Line Parser Library

	[OptionArray("o", "output", HelpText = "The output files to generate.")]
	public string[] OutputFiles { get; set; }

	[OptionList("k", "keywords", Separator = ':', HelpText = "Specify keywords to search the text, separated by a colon.")]
	public List<string> Keywords { get; set; }

	[ValueList(typeof(List<string>), MaximumElements = 3)]
	public List<string> Items { get; set; }
	...
}</pre></div>

	[HelpOption]
	public string GetUsage()
	{
                            	...
	}
}</pre></div>

		help.AddPreOptionsLine(" ");
		help.AddPreOptionsLine("CommandLine parser library demo...");

		help.AddPreOptionsLine(" ");
		help.AddPreOptionsLine(string.Format("Usage: {0} [options]", Path.GetFileName(Application.ExecutablePath)));

		help.AddPreOptionsLine(" ");
		help.AddPreOptionsLine("options:");
		help.AddOptions(this);
		return help;
	}</pre></div>

	[HelpOption]
	public string GetUsage()
	{
		var help = new HelpText
		{
			Heading = new HeadingInfo(Application.ProductName, Application.ProductVersion),
			Copyright = GetAssemblyCopyright(),
			AdditionalNewLineAfterOption = true,
			AddDashesToOption = true
		};

		help.AddPreOptionsLine(" ");
		help.AddPreOptionsLine("CommandLine parser library demo...");

		help.AddPreOptionsLine(" ");
		help.AddPreOptionsLine(string.Format("Usage: {0} [options]", Path.GetFileName(Application.ExecutablePath)));

		help.AddPreOptionsLine(" ");
		help.AddPreOptionsLine("options:");
		help.AddOptions(this);
		return help;
	}</pre></div>

	public class Options
	{
		[Option("i", "input", Required = true, HelpText = "Input file to read.")]
		public string InputFile { get; set; }

		[OptionArray("o", "output", HelpText = "The output files to generate.")]
		public string[] OutputFiles { get; set; }

		[OptionList("k", "keywords", Separator = ':', HelpText = "Specify keywords to search the text, separated by a colon.")]
		public List&lt;string&gt; Keywords { get; set; }

		[ValueList(typeof(List&lt;string&gt;), MaximumElements = 3)]
		public List&lt;string&gt; Items { get; set; }

		private string GetAssemblyCopyright()
		{
			var attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
			if (attributes.Length == 0)
				return "";
			return ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
		}


		[HelpOption]
		public string GetUsage()
		{
			var help = new HelpText
			{
				Heading = new HeadingInfo(Application.ProductName, Application.ProductVersion),
				Copyright = GetAssemblyCopyright(),
				AdditionalNewLineAfterOption = true,
				AddDashesToOption = true
			};

			help.AddPreOptionsLine(" ");
			help.AddPreOptionsLine("CommandLine parser library demo...");

			help.AddPreOptionsLine(" ");
			help.AddPreOptionsLine(string.Format("Usage: {0} [options]", Path.GetFileName(Application.ExecutablePath)));

			help.AddPreOptionsLine(" ");
			help.AddPreOptionsLine("options:");
			help.AddOptions(this);
			return help;
		}
	}
}

}