using System.Globalization;
string date = "2014-02-02";
1st example using DateTime.Parse method DateTime dt = DateTime.Parse(date);
Messagebox.Show(dt);
2nd example using Convert.ToDateTime DateTime dt = Convert.ToDateTime(date);
Messagebox.Show(dt);
3rd example using DateTime.ParseExact methodstring date = "Sun 19 Jan 11:45 AM 2014";
string format = "ddd MMM h:mm tt yyyy";
DateTime dt = DateTime.ParseExact(date,format,CultureInfo.InvariantCulture);
Messagebox.Show(dt);