C#简单的字符串处理

字符串的剔除与跟换

例：

Console.WriteLine("请输入一段字母");
            //string name = Console.ReadLine();
            //string name1="";
            Console.WriteLine(name[0] + "头" + name[2]);
            //char[] newname=name.ToCharArray();
            //for (int i = 0; i < newname.Length; i++)
            //{
            //    if (newname[i] == 's' || newname[i] == 't')
            //    {
            //      //newname[i]=' ';
            //    }
            //    else
            //    {
            //        name1 += newname[i];
            //    }

 字符串大小写转换
            //Console.WriteLine("请输入你要选择的专业，.net还是java");
            //string a = Console.ReadLine();
            //string a1 = a.ToLower();
            //if (a1.Trim()==".net")
            //{
            //    Console.WriteLine("你太有眼光了");
            //}
            //if (a1.Trim() == "java")
            //{
            //    Console.WriteLine("不要太过分，脑子是不进水了");
            //}