c# - Why datetime cannot compare? -

my c# unit test has following statement:

assert.areequal(logouttime, log.first().timestamp); 

why failed following information:

assert.areequal failed. expected:<4/28/2010 2:30:37 pm>. actual:<4/28/2010 2:30:37 pm>. 

are not same?

update:

use if care second:

assert.areequal(logouttime.tostring(), log.first().timestamp.tostring());

have verified number of ticks/milliseconds equal?

if datetime.now() twice back, appear same number down minute , down second, vary ticks. if want check equality minute, compare each datetime degree. information on rounding datetimes, see here

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a note resolution:

the property used measure performance. however, because of low resolution, not suitable use benchmarking tool. better alternative use stopwatch class.