c# RSA 要解密的数据超过此模块的最大值128/256字节

 public string Decrypt()
 {
     var base64EncryptedData = "";
     string privateKey = @"<RSAKeyValue>....</RSAKeyValue>";
    
     RSACryptoServiceProvider provider = new RSACryptoServiceProvider();
     provider.FromXmlString(privateKey);

     // 解密数据
     var r = string.Empty;
     byte[] src = Convert.FromBase64String(base64EncryptedData);
     List<byte> dest = new List<byte>();
     int KEY_SIZE = provider.KeySize / 8;//128  rsp -> System.Security.Cryptography.RSACryptoServiceProvider
     if (src.Length > KEY_SIZE) //要解密的数据超过此模块的最大值 128 字节
     {
         int i = 0;
         while (i < src.Length)
         {
             byte[] t = null;
             if (i + KEY_SIZE > src.Length)   //不是128的整数倍
             {
                 t = new byte[src.Length - i];
             }
             else                             //128的整数倍
             {
                 t = new byte[KEY_SIZE];
             }
             Array.Copy(src, i, t, 0, t.Length);
             byte[] t1 = provider.Decrypt(t, false);//分段解密
             i += KEY_SIZE;
             dest.AddRange(t1);
         }
     }
     else                //小于等于128字节 
     {
         dest.AddRange(provider.Decrypt(src, false));
     }
     r = System.Text.Encoding.UTF8.GetString(dest.ToArray());
     return r;
 }