private void button2_Click(object sender, EventArgs e) { RSACryptoServiceProvider rsa = RSAHelper.CreateRsaProviderFromPrivateKey(textBox_pri_key.Text); // 解密 byte[] jiemi = rsa.DecryptLargeData(textBox_jiemi_input.Text.ToHexBytes( )); if (radioButton3.Checked) { textBox_jiemi_result.Text = jiemi.ToHexString(' '); } else { textBox_jiemi_result.Text = Encoding.UTF8.GetString(jiemi); } }