RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); private void btencoding_Click(object sender, EventArgs e) {     if (mbox.Text == "")     {         MessageBox.Show("加密文字信息不能为空！");         return;     }     if (publickey.Text == "")     {         MessageBox.Show("请生成公钥！");         return;     }     try     {         string pubKey = publickey.Text;         byte[] mw = ASCIIEncoding.ASCII.GetBytes(mbox.Text);         RSACryptoServiceProvider crypt = new RSACryptoServiceProvider();         crypt.FromXmlString(pubKey);         mw = crypt.Encrypt(mw, false);         string encryttext = Convert.ToBase64String(mw);//加密后的结果怎样处理解决显示乱码问题         cbox.Text = encryttext;     }     catch     {         MessageBox.Show("请检查是否打开公匙或者公匙是否损坏！");     } } private void btdecoding_Click(object sender, EventArgs e) {     if (cbox.Text == "")     {         MessageBox.Show("请生成密钥！");         return;     }     try     {         RSACryptoServiceProvider crypt = new RSACryptoServiceProvider();         byte[] bytes = Convert.FromBase64String(cbox.Text);//从密文框中取出的字符串正确处理才能解密         string prtKey = privatekey.Text;         crypt.FromXmlString(prtKey);         byte[] decryptbyte = crypt.Decrypt(bytes, false);         string decrypttext = Encoding.Default.GetString(decryptbyte);         mbox.Text = decrypttext;     }     catch (CryptographicException ex)     {         //MessageBox.Show("请检查是否打开私匙或者私匙是否损坏！");         MessageBox.Show(ex.ToString());     } if (cbox.Text == "")     {         MessageBox.Show("请生成密钥！");         return;     } }