Date/Time calcuations not working

Question

Not sure if it's because it hit a day but I have a calculation:

 

((DateTime.Now - lastdownloaded).Hours > 4)

 

It's returning 0

 

Used to work.  The values right now are 

 

Now: 11/18/2020 4:51:50 PM  

lastdownloaded 11/17/2020 4:40:38 PM

 

It comes out to: 1.00:12:18.1796374

 

Shouldn't this be 24 hours or something?  Sounds like it's literally taking the hours value on the subtraction and not the total hours between the two values.  Any clarity on what this is doing?  Also how do I get it to return what I'm looking for in other words the total hours between the two date/times?

 

Thanks.

 

JR