I am getting total hour from this code : 

```
string date = Request.Form[DFrom.UniqueID];
string date1 = Request.Form[DTo.UniqueID]; ;

DateTime start = DateTime.ParseExact(date, "MM/dd/yyyy hh:mm tt", null);
DateTime end = DateTime.ParseExact(date1, "MM/dd/yyyy hh:mm tt", null);
totaltime = (start - end).TotalHours;

```

Output will be like this : 

> 
> 25.44535
> 
> 
> 

I want to convert the total hours to formatted time like this for example : 
44:12:00