未从Vista中的machine.config读取appSettings

我最近升级到Vista x64,突然间,我的machine.config appSettings块没有被任何人读取。NET程序集。

在C:\Windows\Microsoft中,在configSections之后和configProtectedData之前。NET\Framework\v2.0.50727\CONFIG\machine.CONFIG,我有:

<appSettings>
    <add key="foo" value="blah"/>
</appSettings>
<system.runtime.remoting>
    <customErrors mode="Off"/>
</system.runtime.remoting>

    foreach(var s in ConfigurationManager.AppSettings.AllKeys)
    {
        Console.WriteLine(s);   
    }

    AppSettingsReader asr = new AppSettingsReader();

    Console.WriteLine(asr.GetValue("foo", typeof(string)));

---
The following error occurred while executing the snippet:
System.InvalidOperationException: The key 'foo' does not exist in the appSettings configuration section.
    at System.Configuration.AppSettingsReader.GetValue(String key, Type type)
    at MyClass.RunSnippet()
    at MyClass.Main()
---