Error: String '' was not recognized as a valid DateTime

Hi @rajababu.mandapati

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