Gummy bear this may helpful to you
go to
www.grasmick.com/morefaq.htm thats is US Immigration attorney web site
Q 16 ,Can I keep Both US green Card and Canadian PR status
Answer : YES
it has some solutions how to keep both and maintain residecy requirement.
Gummy bear i personally spoken to Attorney and i was told it is possible and canadian Immgration officer or Law will not have any problem with your US residency,
I have email responses about this confirmation.if you can PM we can talk about that.
this is one of the email response from attorney office i cut /copy and paste it for you Your Canadian Permanent Residency Application will not be affected by your application for status in the US .
"Your Canadian Permanent Residency Application will not be affected by your application for status in the US ."
"
As explained during our telephone discussion today, there is no rule stating that you cannot hold both Canadian and US permanent resident status. Both Canada and the USA have residency requirements which must be met in order to maintain status, and the concern is that one may have difficulty meeting both reequirements."
This is from one of the Canadian immgration firm.
I dont know any one doing it.I want to know if some one is doing it how is their experience.