C#中char\[\]byte\[\]与string之间的转换

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string ss = "abcdefg";
            char[] cc = ss.ToCharArray();
            string s = new string(cc);
            byte[] bb = Encoding.UTF8.GetBytes(ss);
            s = Encoding.UTF8.GetString(bb);
            Console.WriteLine(s);
            StringBuilder sb = new StringBuilder();
            foreach (char c in cc)
            {
                sb.Append(c);
            }
            s = sb.ToString();
            Console.WriteLine(s);
            string strOr = "OR";
            string result = string.Concat(new string[] { " A ", strOr, " B ", Environment.NewLine, " C ", strOr, " D " });
            Console.WriteLine(result);
            Console.ReadKey();
        }
    }
}
/*
abcdefg
abcdefg
 A OR B
 C OR D
*/