How to give float rating in asp.net

Question

Hi All,
I am using AJAX Rating Control.I want half star rating.
For Example,
If My AVG Rating Count is 3 Then My Stars Wants to be show 3
If My AVG Rating Count is 2.6 Then My Stars Wants to be Show 2 1/2 mark i.e., two & half stars.But,it was not showing then also it is showing 3 stars.