C# 正则表达式

              string str = "abcbbbbbbbb";
            string reg = @"^abc";
            Console.WriteLine(Regex.IsMatch(str,reg ));//静态的重载方法
              Regex pattern = new Regex("^abc");
            Console.WriteLine(pattern.IsMatch(str)); //生成对象上的方法

		

            string str = "123456abc";
            Regex pattern = new Regex(@"\\d+");
            Console.WriteLine(pattern.Replace(str,"6666"));
            string pattern1 = @"\\d+";
            Console.WriteLine(Regex.Replace(str,pattern1,"6666"));

            string str1 = "asd,sss,asd,asdf,jjjj,cccc";
            Regex pattern2 = new Regex(@"\\w+");
            Console.WriteLine(pattern2.Replace(str1, "v5v5", 2));
            Console.WriteLine(pattern2.Replace(str1, "v5v5", 2,8));

		

            string str = "vchaha vcoo vclielie vbguale vfgg vckk";
            Regex pattern = new Regex(@"vc\\w*");
            Match matchMode = pattern.Match(str);
            while (matchMode.Success) 
            ...{
                Console.WriteLine(matchMode.Value);
                matchMode = matchMode.NextMatch();
            }
            Console.WriteLine("-----------------------------------");
            Match matchMode1 = Regex.Match(str, @"vc\\w*");
            while (matchMode1.Success)
            ...{
                Console.WriteLine(matchMode1.Value);
                matchMode1 = matchMode1.NextMatch();
            }

		

            string input = "hahaha 123xiaodi 55nihao 66chifanlema ccc333 ccc";
            Regex pattern = new Regex(@"\\d+[a-z]+",RegexOptions.IgnoreCase);
            MatchCollection matchsMade = pattern.Matches(input);
            foreach (Match item in matchsMade)
            ...{
                Console.WriteLine(item.Value);            
            }