How can convert a datetime to double?

Question

How can convert a datetime to double?

Answer 1

A better approach than ToOADate is to use this:

double timestamp = DateTime.UtcNow.Ticks;

See this post where precision is lost when doing DateTime.Now.AddTicks(1000).ToOADate(), if the example there were changed to (double)DateTime.Now.AddTicks(1000).Ticks the precision is not lost.

Answer 2

var converted = DateTime.Now.ToOADate();