字符串分隔的各种类型：

            //string s = "hello";

            //char[] chars = s.ToCharArray();

            //chars[0] = 'a';

            //string s1 = new string(chars);

            //Console.WriteLine(s1);

            //bool b = "abc".Equals("ABC",StringComparison.OrdinalIgnoreCase);

            //Console.WriteLine(b);

            //int i = "123".CompareTo("abc");

            //Console.WriteLine(i);

            //Console.ReadKey();

            //string s = "abc,hec,ccc,,fff";

            //string[] strs = s.Split(new char[]{','},StringSplitOptions.RemoveEmptyEntries);

            //foreach (string s1 in strs)

            //{

            //    Console.WriteLine(s1);

            //}

            //Console.ReadKey();

            string s = "我是周杰伦我是刘德华我是韩庚";

            string[] strs = s.Split(new string [] { "我是" }, StringSplitOptions.RemoveEmptyEntries);

            foreach (string s1 in strs)

            {

                Console.WriteLine(s1);

            }

            Console.ReadKey();