.
Which country are you a citizen of?
On what basis do you wish to enter Canada now? Immigrant, visitor, student .. etc. ?
Are you legally in the country you are in now?
Did Canada deny you asylum request and send you away?
Related: was your asylum claim legit &/or did Canada decide not to allow it? For what reasons, if so?
Did they issue a deportation order?
Did they issue you any ban? Any document telling you to get out/stay out?
From what I get, you have not done anything illegal. Or, nothing that got you into a Canadian court or with a conviction.
If immigration "invited" you to leave but did not actually detain and deport you, this should all be a fairly minor issue.
This thread probably has some good information for you to consider:
-> Canada forum ->
Thinking about moving to canada
http://www.immigrationboards.com/viewtopic.php?t=18679
the Admin