Returns a -1, 0, or 1 number value based on the first text value, {0}, being less than, equal to, or greater than the second ...

Returns a -1, 0, or 1 number value based on the first text value, {0}, being less than, equal to, or greater than the second text value, {1}, in dictionary order. 
    An optional comparer function, {2} (TextComparer.IgnoreCase), can be provided to make the comparison case insensitive. The default is case sensitive.