Try this :
DateTime myDt;
bool parsed = DateTime.TryParseExact(date,"d/M/yyyy",null,out myDt);
if(parsed) DoSomething;
Actually DateTime.TryParseExact works on taking a Date template which u see here as "d/M/yyyy" and try to match the string to be exact like that "12/03/1902" for example . Find more here : http://msdn.microsoft.com/en-us/library/ms131044(v=vs.110).aspx
Also You can use DateTime.TryParse