AFAIK, Visual Studio isn't and never has been available to run on OS X, so you'd have to either run it under Boot Camp or a VM app, such as Parallels Desktop (I'm a Parallels user, so that's what I usually reommend).
Is 256GB enough? Just barely. I've a lean, mean 512GB SSD and I use just a portion of that with a full 377GB free (after I finally consolidated my entire iTunes library onto an external drive). And I run XP under Parallels. SO you could get by with 256GB. And, if you wish to upgrade later, OWC has a 480GB storage card that you can install - for $580 (compare that to the cost of the Apple 512GB upgrade - I think that you come out cheaper with Apple).
The Visual Studio Community 2013 image enables you to unleash the full power of Visual Studio to develop cross-platform solutions. Create apps in one unified IDE, and incorporate new languages, features, and development tools into them with Visual Studio Extensions (available in the Visual Studio Gallery). The class file appears to be created but there are two duplicate popups saying 'Save Failed'. This appears to only happen if you delete the class1.cs file. You can create any number of classes while it exists and it works fine, it appears to happen when the project is empty and you are creating your first class. Developer Community for Visual Studio Product family. Get help from our community supported forum.
Yes, you could get by with 256GB - keeping in mind that you can always upgrade to a larger capacity card later on.
Visual Studio Community 2015 Offline Installer
Clinton