Property Tax Sale in Ontario

[Tudor Pop]

Has anyone completed a property tax sale in Ontario? This is where the city tenders the house of the home owner who has not paid taxes and sells it to recoup unpaid taxes.
question 1) what happens to the mortgage that's still on the property (if there is one) 2) what happens with the lien on the property 3) how did/can you get possession what's the best way?
by the way if anyone knows how to or can help me move this in the Ontario forum please let me know I can't figure it out