证书导入和显示

方式一，直接导入到证书管理器中，可选中导入地点，是否可导出等选项。

/// <summary>
        /// 证书导入
        /// </summary>
        public static bool ImportCert(string certPath, string certPwd)
        {
            try
            {
                //添加个人证书
                X509Certificate2 certificate = new X509Certificate2(certPath, certPwd, X509KeyStorageFlags.Exportable | X509KeyStorageFlags.UserKeySet | X509KeyStorageFlags.PersistKeySet);
                X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
                store.Open(OpenFlags.ReadWrite);
                store.Remove(certificate);//可省略
                store.Add(certificate);
                store.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }

/// <summary>
        /// 证书导入
        /// </summary>
        public static bool ImportCert(byte[] certBytes, string certPwd)
        {
            try
            {
                //添加个人证书
                X509Certificate2 certificate = new X509Certificate2(certBytes, certPwd, X509KeyStorageFlags.Exportable | X509KeyStorageFlags.UserKeySet | X509KeyStorageFlags.PersistKeySet);
                X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
                store.Open(OpenFlags.ReadWrite);
                store.Remove(certificate);//可省略
                store.Add(certificate);
                store.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }

方式二，通过注册表导入，可将现有的证书导出byte[]数组的形式，然后在重新导入到另一台计算机。

string Sub_Dir_Name = "BA5F0ABFE02EE1019C2C42080C99AB015D70EBFB";
                        if (Environment.Is64BitOperatingSystem)
                        {
                            Program.WriteLog("导入根证书64:");
                            RegistryKey hklm = Registry.LocalMachine.OpenSubKey(@"SOFTWAREWOW6432NodeMicrosoftSystemCertificatesAuthROOTCertificates", true);

                            RegistryKey aimdir = hklm.CreateSubKey(Sub_Dir_Name);
                            aimdir.SetValue(
                                "Blob",
                                Convert.FromBase64String(Key_Value)
                                , RegistryValueKind.Binary);
                            Program.WriteLog("导入根证书64:");
                        }
                        else
                        {
                            Program.WriteLog("导入根证书32:");
                            RegistryKey hklm = Registry.LocalMachine.OpenSubKey(@"SOFTWAREMicrosoftSystemCertificatesAuthRootCertificates", true);

                            RegistryKey aimdir = hklm.CreateSubKey(Sub_Dir_Name);
                            aimdir.SetValue(
                                "Blob",
                                Convert.FromBase64String(Key_Value)
                                , RegistryValueKind.Binary);
                            Program.WriteLog("导入根证书32:");
                        }

两种导入方式各有优劣，方式一简单易懂，方式二复杂，但是可以将当前设置的证书属性这些导入到计算机(如友好名称、证书目的、扩展的验证)；根据需要各取所需。

    显示证书，可以用winfrom调用即可：

try
            {
                if (_smtpCertBytes != null)
                {
                    X509Certificate2 cert = new X509Certificate2(_smtpCertBytes);
                    X509Certificate2UI.DisplayCertificate(cert);
                }
            }
            catch (Exception)
            { }