using System;$$using System.Collections.Generic;$$using System.Globalization;$$namespace PaintingEstimate$\{$class PaintingEstimate $//$C# class$\{$static void Main$($string$[]$ args$)\{$Console$.$Write$("$Enter length of the room in feet : $")$;$$int length $=$ int.Parse$($Console$.$ReadLine$())$;$$Console$.$Write$("$Enter width of the room in feet : $")$;$$int width $=$ int.Parse$($Console$.$ReadLine$())$;$$Console$.$WriteLine$("$The price of Room painting is : $\{0\}",$ costOfRoomPainting$($length$,$width$).$ToString$("$C$",$ CultureInfo.GetCultureInfo$("$en$-$US$")))$;$\}$public static double costOfRoomPainting$($int length,int width$)\{$int squareFoot $=($length $+$ length $+$ width $+$ width$)*9$;$$return squareFoot $*6$;$\}\}\}$