C#中MD5加密

using System.Security.Cryptography;
using System.Text;

namespace Common
{
    public class Md5Helper
    {
        public string GetMd5(string txt)
        {
            //创建md5对象
            MD5 md5 = MD5.Create();
            //将字符串转成字节数组
            byte[] bs = Encoding.UTF8.GetBytes(txt);
            //加密
            byte[] bs2 = md5.ComputeHash(bs);
            //将字节数组转成字符串
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < bs2.Length; i++)
            {
                sb.Append(bs2[i].ToString("X2")); //x小写X大写
            }
            return sb.ToString();
        }
    }
}