MachineKey更改未反映在web.config中

Question

In my web application, there is an administrator ability to change the validation method/algorithm to SHA1 to HMACSHA256, HMACSHA384, etc. etc.

In the code, when I retrieve the value from the web.config using ConfigurationManager, it shows as being updated.

However, when I open up the Web.config itself, the value does not appear in the MachineKey section. Why is it now showing up?

edit: The technloogy I am using is Visual Studio C# and MVC. A portion of the web.config is below:

  <system.web>
<machineKey validationKey="22FEA7D6533FCCE331C2342A1801051F5E2890749CB2D5EF2EEABF8B0D944F389F46FA061D1A203EB75F3A9197914299676917FFD355456CFA0B49CA4C30B348"
  decryptionKey="30B2FA2A8C54665E18D9A35E3541BFED6A3E8A640DBA4070" />
<authentication mode="Forms">
  <forms name="FormsAuth1" loginUrl="https://localhost/OidcApplication/Oidc/Authenticate" timeout="2880" requireSSL="false" />
</authentication>
<compilation debug="true" targetFramework="4.5.2" />
<httpRuntime targetFramework="4.5.2" />
<httpModules>
  <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" />
</httpModules>

This is how I retrieve the machine key values:

machineKeyConfig = (MachineKeySection)GetConfigurationSection("system.web/machineKey");

And this is how I set the machine key values:

var machineKeyConfig = (MachineKeySection)GetConfigurationSection("system.web/machineKey");

machineKeyConfig.DecryptionKey = machineKeySettings.DecryptionKey;
machineKeyConfig.Validation = machineKeySettings.Validation;
machineKeyConfig.ValidationKey = machineKeySettings.ValidationKey;
machineKeyConfig.CurrentConfiguration.Save(ConfigurationSaveMode.Minimal);

Answer 1

First of all, I would check whether the file you are saving to is the same you are reading:

var ConfigFilePath = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;

By the way, what's the class and namespace of the GetConfigurationSection method?