Can I hold both the US Green Card and Canadian Permanet residency together?

[smf94]

I have been living in the U.S. and recently got my greencard. My wife is a Canadian
citizen and she has been living with me in the U.S. for the last 4.5 years although she never worked. We both recently got our green cards. I am a  Canadian permanent resident as well. I am considering getting a job in Canada and I was wondering if there is any way I can still keep the U.S. greencard and maintain my Canadian permanent residency? We still own property in the U.S and we also own property in Canada.

[ocanada]

i think canada allows dual citizenship.

[GK]

You can reside in Canada and keep your GC for 1 year.  If you don't return to USA within 12 month you will loose your US status