Compare time Array in c#

Question

hi

i have a array of time

var A ={8:50,8:50,9:50,10:00,10:00,10:00,13:00,15:00,18:00,19:00}

when i substract next value from previous value  and the difference is greater than 5 min then skip the next value and first value store in another array

ex suppose we substract 10:00 fom 9:50 and diff is greater than 5 min skip the 10:00 and store 9:50