MD5加密過時方法替換

使用System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile進行MD5加密時，會出現已過時

 1 /// <summary>
 2 /// 32位MD5加密
 3 /// </summary>
 4 /// <param name="input"></param>
 5 /// <returns></returns>
 6 private static string Md5Hash(string input)
 7 {
 8     MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
 9     byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
10     StringBuilder sBuilder = new StringBuilder();
11     for (int i = 0; i < data.Length; i++)
12     {
13         sBuilder.Append(data[i].ToString("x2"));
14     }
15     return sBuilder.ToString();
16 }