your missing an amperstand (&) (is this a typo?)
if (rt1 == null & rt2 == null) // oops!
if (rt1 == null && rt2 == null) // like this....
Muad'Dib
2009-10-20 19:27:35
+2
A:
good catch. But fixing this didn't fix the problem.
Kevin
2009-10-20 20:35:08
A:
Sometimes a sort algorithm will end up comparing an object to itself. When this happened, it triggered the code:
if (rt1 == null)
return -1;
It was this that caused the error. You've got to be sure that you have all cases covered.
And if those x,y values represent points, you might want to check this article on sorting them: http://www.c-sharpcorner.com/UploadFile/mgold/SortedDictionarySample06202007142815PM/SortedDictionarySample.aspx
Michael Dillon
2009-10-20 19:28:36
If it is comparing to itself, why would `rt1` be `null`, and it not have already triggered the `return 0` case?
Marc Gravell
2009-10-20 19:31:43
I'm assuming that the first if statement is the bit that he added to get rid of the error message.
Michael Dillon
2009-10-20 19:33:28