How do I open the machine.config from .NET v2.0.50727

Question

The application I want to read settings from writes to the section of the machine.config in C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG.

But when I use the following code:

Configuration myMC = WebConfigurationManager.OpenMachineConfiguration();
Console.WriteLine(myMC.FilePath.ToString());

The path returned is always the .NET 4 machine.config:

c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Config\machine.config

Edit: my app uses MEF, so it requires .NET 4, writing the app from .NET 2 is not an option.

Answer 1

You can open it as an xml or text file, see: http://support.microsoft.com/kb/307548

You could create a service that runs in .net 2.0, and call that service from your .net 4.0 app.

But why do you need to do this?

Answer 2

It turns out that there is a way to specify which machine.config to open with a ConfigurationManager:

ConfigurationFileMap myCFM = new ConfigurationFileMap(fPath);
Configuration myMC = ConfigurationManager.OpenMappedMachineConfiguration(myCFM);
Console.WriteLine(myMC.FilePath.ToString());

where fPath was the Path to the one I wanted. I got that by digging through the registry.