String、StringBuilder
internal class Mainclus
{
internal static void Main(string[] args)
{
//创建方式
string a = "*world";
string new1 = "hello*world";
string new2 = "hello" + "*world";
string new3 = new string(new char[] { 'h', 'e', 'l', 'l', 'o', '*', 'w', 'o', 'r', 'l', 'd' });
string new4 = "hello" + a;
Console.WriteLine(new3);
//属性
Console.WriteLine(new1.Length);
//索引器，string中对[int index]已经做了定义.
Console.WriteLine(new1[2]);
//比较,==比较字符串的内容是否相等,在string中也是对=