Input string was not in a correct format.    at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at Bayindir.Controllers.TibbiBolumlerController.Detay() in C:\Users\gokhan.cinar\source\repos\Bayindir.Project\Bayindir\Controllers\TibbiBolumlerController.cs:line 0