Corporations generally pay tax at about 50% on net rental income, and at about 25% on a rental property capital gain (rates differ by province). This is similar to what a top-rate taxpayer might pay if they owned the same property personally. Therefore, many people would pay less tax to own a rental property personally instead of corporately, and could also avoid the cost and complexity of the corporate structure.
If that's true then it makes no sense to run a rental business through your corporation.