去掉小数点后面多余的0

public static string subZeroAndDot(string s)

        {  

            if(s.IndexOf(&＃8220;.&＃8221;) > 0){

                string[] a = s.Split(&＃8216;.&＃8217;);

                int idx=a[1].Length;

                for (int i = a[1].Length &＃8211; 1; i >= 0; i&＃8211;)

                {

                    if (a[1].Substring(i,1) != &＃8220;0&＃8221;)

                        break;

                    idx&＃8211;;

                }

                if (idx >= 1)

                {

                    string tmp = a[1].Substring(0, idx);

                    return a[0] + &＃8220;.&＃8221; + tmp;

                }

                else

                    return a[0];               

            }  

            else

                return s;  

        }