c# - How does SequenceEqual work in Reactive Extensions -

i have hard time figure out how sequenceequal works in reactive extensions version 2.2.5

below code

var subject1 = new subject<int>();             var subject2 = new subject<int>();              iobservable<bool> sequenceequal = subject1.sequenceequal(subject2);              subject1.onnext(5);             subject1.onnext(3);              subject2.onnext(1);             subject2.onnext(4);              //this notified if 2 sequences completed             sequenceequal.subscribe(b => console.writeline("two sequences equal ? {0}", b));              subject1.oncompleted();             subject2.oncompleted(); 

i expected output "two sequences equal? false", result true contained different elements.

i'm wondering why result that? sequenceequal do?

with sequenceequals monitor point subscribe. subscribe before onnext calls , you'll false in subscription code or use replaysubjects.