IF formula for Multiple Rows

I'm trying to create an if formula to look at an entire column and if it matches a number of rows then add the value_if_true. So I want to look at the entire column C to see if there is a match to column B rows 2-20 then input the true value but leave blank if false. When I use the following formula I'm just getting a error, the array value cannot be found. How do I need to adjust this or is this even the right formula?

=IF(C:C=B2:B20,"Yes",)

Thanks!