Im using https://www.quartz-scheduler.net to schedule some archiving in Umbraco. Since these "jobs" are done outside of UmbracoContext (not started by a web request) I have to create the UmbracoContext myself (right?). I do this by calling:

var umbContext = UmbracoContext.CreateContext(
                dummyHttpContext,
                ApplicationContext.Current,
                new WebSecurity(dummyHttpContext, ApplicationContext.Current),
                UmbracoConfig.For.UmbracoSettings(),
                UrlProviderResolver.Current.Providers,
                false)
var umbHelper = new UmbracoHelper(umbContext);
// bla bla bla do stuff

But I just noticed UmbracoContext.CreateContext. What is the difference from UmbracoContext.CreateContext and when should I use which?

I also wonder if its safe to use these? Will they be "destroyed" when my "Jobs"-code has been finished?