string str="1,2,3,4,5";
string[] sArray=Regex.Split(str,"，",RegexOptions.IgnoreCase); 


多字符串

string str="aaajbbbscccjdddseee";
string[] sArray=str.Split(new char[2]{‘j‘,‘s‘}); //分割结果为aaa bbb ccc ddd eee
单字符串

string str="aaajbbbjccc";
string[] sArray=str.Split(‘j‘); //分割结果为 aaa bbb ccc


转载:https://www.cnblogs.com/luyj00436/p/11658687.html

C# 字符串切割——Split