public static void Main()
const string tmp = "17:23:24";
var t1 = TimeSpan.Parse(tmp);
var t2 = TimeSpan.ParseExact(tmp, "hh\\:mm\\:ss", System.Globalization.CultureInfo.InvariantCulture);
var t3 = TimeSpan.Parse(tmp, System.Globalization.CultureInfo.InvariantCulture);
var t4 = TimeSpan.ParseExact(tmp, "hhmm", System.Globalization.CultureInfo.InvariantCulture);
Console.WriteLine("Hello World");