/// <summary>
/// Sets the instance used for reading and writing settings to <paramref name="settingsInternal"/>, and returns
/// the previous instance.
/// THIS IS FOR TESTING PURPOSES ONLY.
/// </summary>
public static SettingsInternal ExchangeInstance(SettingsInternal settingsInternal)
{
var previousSettingsInternal = _instance;
_instance = settingsInternal;
return(previousSettingsInternal);
}
static Settings()
{
_instance = new SettingsInternal(FileSystem.Singleton, DateTimeProvider.Singleton);
}