C#加密app.config中连接字符串的方法

public static class EncryptConnection{  public static void EncryptConnectionString(bool encrypt)  {   Configuration configFile = null;   try   {    // Open the configuration file and retrieve the connectionStrings section.    configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);    ConnectionStringsSection configSection = configFile.GetSection("connectionStrings") as ConnectionStringsSection;    if ((!(configSection.ElementInformation.IsLocked)) && (!(configSection.SectionInformation.IsLocked)))    {     if (encrypt && !configSection.SectionInformation.IsProtected)     //encrypt is false to unencrypt     {      configSection.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");     }     if (!encrypt && configSection.SectionInformation.IsProtected)     //encrypt is true so encrypt     {      configSection.SectionInformation.UnprotectSection();     }     //re-save the configuration file section     configSection.SectionInformation.ForceSave = true;     // Save the current configuration.     configFile.Save();    }       }   catch (System.Exception ex)   {    throw (ex);   }   finally   {   }  }}