double timestamp = 1113211532;
 
// First make a System.DateTime equivalent to the UNIX Epoch.
 
System.DateTime dateTime = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
 
// Add the number of seconds in UNIX timestamp to be converted.
 
dateTime = dateTime.AddSeconds(timestamp);
 
// The dateTime now contains the right date/time so to format the string,
 
// use the standard formatting methods of the DateTime object.
 
string printDate = dateTime.ToShortDateString() +" "+ dateTime.ToShortTimeString();