You can’t do that sort of thing. (Random House Unabridged)
You can't leave until you finish washing the dishes. (Webster’s Learner’s)
When ‘can’ is used for prohibition, does it have to stuck with not, that is, do cannot or can’t have to be used; not permitting 'can not'? I thought that ‘you can not do that sort of thing’ has equal meaning of the dictionary's example, but I don’t find any examples of ‘can not’. Can’t we use ‘can not’, when we do not give permissions?