如何去掉字符串最右边的逗号？

Question

比如字符串 string str3="1,2,3,"如何去掉最右边的逗号？

Answer 1

string str3 = "1,2,3,";
string abc = (str3 + ",").Replace(",,", "");

Answer 2

string stra = "1,2,3,";
stra = stra.Remove(stra.LastIndexOf(','),1);//1,2,3

Answer 3

方法有很多种，上面已经说很多了，现在再提供一个方法
                       string str3 = "1,2,3,";
                    string aa = str3.Substring(0, str3.Length - 1);