Cast app settings from web config in one shot

AppSettings.cs

//Make this class static so that it is loaded in memory when the app starts
public static class AppSettings {

	public static T Get<T>(string key) {
		var appSetting = ConfigurationManager.AppSettings[key];
		if (string.IsNullOrWhiteSpace(appSetting)) throw new AppSettingNotFoundException(key);
        
		var converter = TypeDescriptor.GetConverter(typeof(T));
		return (T)(converter.ConvertFromInvariantString(appSetting));
	}

}

//In another class use like:
var isProd = AppSettings.Get<bool>("IsProd");

Thanks to https://stacktoheap.com/blog/2013/01/20/using-typeconverters-to-get-appsettings-in-net/