Question : String.Format not working when using Label Text

I have the following code which I am using to display calculated averages into various labels.  When I use the String.Format to control the display of decimal places it has no effect and displays numbers with several numbers to the right of the decimal point.

Example.  It will display 266.167689999999  where I want it to only display 266.17

Here is the code to populate the Labels:

           //***** divide Total by count to get average ********
           decimal lodgingAdvAvg = lodgingAdvTotal / lodgingAdvCount;

         //****** Display Results on Label Text and format to 2 decimal points ***********
            lblLodgingAdv.Text = String.Format("{0:d}", lodgingAdvAvg.ToString());

Answer : String.Format not working when using Label Text

try this in between:
Math.Round(lodgingAdvAvg,2);