public static void Main()
var string1 = "12345 10 etc";
var string2 = "12346 20 etc";
var string3 = "12347 etc";
int.TryParse(string1.Substring(5, 2), out _CUSTBAL);
Console.WriteLine(_CUSTBAL);
int.TryParse(string2.Substring(5, 2), out _CUSTBAL);
Console.WriteLine(_CUSTBAL);
int.TryParse(string3.Substring(5, 2), out _CUSTBAL);
Console.WriteLine(_CUSTBAL);