Limit number of parameters per method?

Question

Assuming the parameters are all the same type, is there a rule of thumb in regards to the number of parameters for a method? Im just wondering where I should draw the line and

Answer 1

If you will be passing an unknown number of arguments, you should use varargs or pass a IEnumerable. Of course, sometimes you pass a fixed number of items of the same type. In the latter case, the fixed number should follow from the method's purpose.