字符串数组去重复

先 using System.Collections.Generic; 引用List。 

 using System.Collections.Generic; public static string setSID(string[] arr) { string outStr = ""; List<string> listString = new List<string>(); foreach (string eachString in arr) { if (!listString.Contains(eachString)) listString.Add(eachString); } foreach (string eachString in listString) { if (eachString != "") { outStr += eachString+"; "; } } return outStr; }