I have released a version for Visual Studio 2017 which can be found here..
https://marketplace.visualstudio.com/items?itemName=fluffyerug.Autosave2017
ChangeLog
v1.1.1
Now builds the current selected configuration e.g. Debug.
v1.1.2
Now initializes correctly on loading visual studio.
v1.1.3
Interval can now be user configured. Tools->Options-AutoSave->AutoSave Settings-Save Interval - This can a value between 1 and 20 which is in seconds.
v1.1.4
Bug: Fix for not returning correct interval on loading options page
v1.1.5
Bug: Default interval setting for new install was incorrect, to fix either download version 1.1.5 or manually change the interval
v1.1.6
Having lost access to my gallery I've had to create anthor version 1.1.6 is just an increment to allow this, I will be added a few addtions and requests which I'll release as version 2.x.x
v2.0
Please uninstall any previous versions before installing version 2.0
Starting with version 2 you can now turn off auto build and keep autosave still active, your files will still be saved but the project will not be built. I've also speeded up the build process for those that still require this.