i don't know your situation exactly if you are eligible to immigrate under the skilled workers class within category number 3 ( students or workers who are legally residing in Canadafor at least 12 months immediately before submitting their application) because even if you are able to get work permit for one year in canada, this will make you eligible to apply under that category FSW but if you don't meet the six selection factors your applicatin will be refused at the second stage without refund.
http://www.cic.gc.ca/english/immigrate/skilled/apply-factors.asp
the second thing is to be aware of the period of time that you will spend in canada legally :
it means that if you are an international student or foreign worker who has been living in canada legally for one year you also have to prove that you are still residing in canada legally, because if you leave canada your application will be canceled simply because they will process your application at buffalo NY. not at the visa office responsible on your country of nationality, therefore, make sure if you are eligible, that you have enough time to stay legaly in canada while they will be processing your application.
"Note: Eligibility as a temporary foreign worker or international student is not limited to holders of work or
study permits. Applicants can meet the above eligibility requirement simply with evidence that their
authorized period of stay has been at least one year, that throughout this period they have been
temporary foreign workers or international students, and that they are still in Canada. For international
students, it is sufficient to have studied for one academic year (i.e. two terms or semesters) during
one year of legal residence"
"Persons in Canada who have been studying or working here throughout a one-year period, during
which they were also subject to an unenforced removal order, are not legally residing in Canada.
Their applications are not eligible for placement into processing under Ministerial Instructions."
"Evidence of their authorized stay may include: an entry stamp in their passport, a temporary resident
record, a work permit, or a study permit. Evidence of being a temporary foreign worker or
international student may include: letters from employers or schools, records of pay, attendance,
report cards, transcripts, etc. Evidence of being in Canada may include a residential address and
correspondence sent to that address. These examples of evidence are neither exhaustive nor
exclusive."
http://www.cic.gc.ca/EnGLIsh/resources/manuals/op/op06-eng.pdf
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