c# - How To Check Deadline Of a Task in Wpf Application? -

i have wpf application in application want check deadline of task without simultaneously checking of database .

example - have assign 5 hrs task. want check deadline of task 5 hrs complete or not ?

how perform condition ?

i'm assuming task object has at least 2 properties - duration , starttime.

without these 2 properties don't see possible how determine if task instance should or should not completed yet.

also, duration should of type timespan.

now,

task _task = ...   // task instance  bool ispasttaskdeadline = (datetime.now - _task.starttime) > _task.duration;