convert datetime to date format dd/mm/yyyy

First of all, you don't convert a DateTime object to some format, you display it in some format.

Given an instance of a DateTime object, you can get a formatted string in that way like this:

DateTime date = new DateTime(2011, 2, 19);
string formatted = date.ToString("dd/M/yyyy");

As everyone else said, but remember CultureInfo.InvariantCulture!

string s = dt.ToString("dd/M/yyyy", CultureInfo.InvariantCulture)

OR escape the '/'.

DateTime dt = DateTime.ParseExact(yourObject.ToString(), "MM/dd/yyyy hh:mm:ss tt", CultureInfo.InvariantCulture);

string s = dt.ToString("dd/M/yyyy", CultureInfo.InvariantCulture);