此文章不断补充
1、判断该字符串是否存在于字符串数组中
1 string[] arr = {"aaa","bbb","aba","ccc" }; 2 string str = "vv"; 3 Console.WriteLine(arr.Contains(str));
2、将字符串中的标点符号替换成空格
1 string str = "fdasjklfsdalj;dfsafjksdjkgd,fsdajklfjksldaklj klkfdska;fwefew.45fsd4521fsa3"; 2 string strRegex = Regex.Replace(str, @"\p{P}", " "); 3 Console.WriteLine(strRegex);
原文：http://www.cnblogs.com/helloEveryBody/p/5371483.html