If you are a dual Canadian citizen used to travelling to or transiting through Canada by air with a non-Canadian passport, you will no longer be able to do so as of November 10, 2016. You will need a valid Canadian passport to board your flight coming back to Canada.
If your country of origin needs you to enter and exit that country using a passport issued by its government, you will still need a valid Canadian passport to board your flight to Canada. Make sure to carry both passports when you travel.
http://www.cic.gc.ca/english/visit/dual-canadian-citizens.asp#background