c# cool string extend

gistfile1.c

public static class StringExtentions
{
	// example "Controls_Admin_AdminDocument_EditDocumentList load IsPostBack={0}".debug(IsPostBack);
	public static void debug(this string str, params object[] args)
	{
		var args_json = args.Select(a => a.json()).ToArray();

		Console.WriteLine("********************************");
		Console.WriteLine(str.f(args_json));
		Console.WriteLine("********************************");
	}

	public static string f(this string str, params object[] args)
	{
		return string.Format(str, args);
	}

	public static string json(this object obj)
	{
		JavaScriptSerializer serializer = new JavaScriptSerializer();
		return serializer.Serialize(obj);
	}

	public static string line_to_br(this string str)
	{
		return str + "<strong>123</strong>".Replace("\r\n", "<br/>");
	}
}