Piechart generate from percentages

I need a programmer to make a custom piechart that shows as a png file. The code needs to be handwritten and written in server side code using c#/.net. It should look like the sample on the attached file One should be able to customize the size of the pie chart before it is generated. One should be able to select the colors of the areas in the pie chart (there are always only 3 areas - not as on the attached image)