Try this way
Str variable = DateTime.ParseExact("Yourinput",{"dd/MMM/yyyy","MM/dd/yyyy","dd.MM.yyyy"},System.Globalization.CultureInfo.InvariantCulture,System.Globalization.DateTimeStyles.None).ToString("dd/MM/yyyy")
Regards,
Gowtham K
Try this way
Str variable = DateTime.ParseExact("Yourinput",{"dd/MMM/yyyy","MM/dd/yyyy","dd.MM.yyyy"},System.Globalization.CultureInfo.InvariantCulture,System.Globalization.DateTimeStyles.None).ToString("dd/MM/yyyy")
Regards,
Gowtham K