Is there any option in web application for saving data locally and updating it automatically while connection restored?

For the first time in the history of ASP.NET, you can run ASP.NET5 applications on OSX and Linux. Let me repeat this. ASP.NET5 apps can run on Windows, OSX, and Linux. This fact opens up ASP.NET to a whole new audience of developers and designers.

The traditional audience for ASP.NET is professional developers working in a corporation. Corporate customers are welded to their Windows machines.

Startups, in stark contrast, tend to use OSX/Linux. Whenever I attend a startup conference, the only machines that I see in the audience are Macbook Pros. These people are not the traditional users of ASP.NET