How to view cshtml page in visual studio?

If you need the visual assistance when designing, you can run your application without debugging ( Ctrl - F5 ), and then once updates are made, you can refresh the web browser to view updates. It isn't real-time, but at least it is something.

The design view doesn't exist in MVC projects.

Take a look at this answer for more information: Is there any graphical designer for ASP.NET MVC?