Is RevitApi 2016 compatible with Revit 2015?

[Anonymous]

If I write a Revit addin using Revit api 2016 (I mean RevitApi.dl and RevitApiUi.dll in Revit 2016 folder) The plugin does not run without any problems on a system with Revit 2015 installed.

For example I have been developing a revit plugin using the latest version of dll from revit 2016. And I have used several methods and properties that are only available in the latest api version. For example I used somewhere the following code:

Autodesk.Revit.ApplicationServices.Application.IsLoggedIn

This is not available in revit api 2015. So it throws SystemMissingMehotdException.

So How could I handle this if one of my clients uses revit 2015 not 2016? 

Do I have to use Revit api 2015 if i want support clients who use revit 2015? Does exist an way to use Revit APi 2016 capabilities in revit 2015?

Thanks for any help.

[Mustafa.Salaheldin · Accepted solution]

This can't be done, if your code method is not backward compatible then you will not be able to execute it in the older Revit version.

[jeremytammik · Accepted solution]

To put it clearly and succinctly:

> Do I have to use Revit 2015 API if I want to support clients who use Revit 2015?

Yes.

> Does any way exist to use Revit 2016 API capabilities in Revit 2015?

No.

Cheers,

Jeremy