I have an extension method which uses some configuration settings. I've declared these as static.

public static class Extensions
{
    static string _mailServer = ConfigurationManager.AppSettings["MailServer"];
    // ... etc    

    public static void SendEmailConfirmation(this IOrder order) { }
}

I just wanted to check that this is doing what I intend as I'm not 100% sure. The idea is that I don't want to have to keep reading these values, I'd like them to be read once and cached for the lifetime of the web application. Is this what will happen? Thanks

c# .net static
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