Combine date and time when date is a DateTime and time is a string

Question

I am working with an old mysql database in which a date is stored (without a time) as a datetime and a time is stored as a string (without a date).

In C# I then have a D

Answer 1

You can use TimeSpan.Parse to parse the time, and then add the result to the date:

DateTime newDateTime = oldDateTime.Add(TimeSpan.Parse(timeString));