ASP.NET Core 1.1 runs fine locally but when publishing to Azure says “An error occurred while starting the application.”

Question

I\'ve been developing an ASP.NET Core web app, based largely on the MVC template provided in Visual Studio 2017 RC2. It runs just fine in local debug mode, but when I try to

Answer 1

In My case, that was because I was trying to get a some data in Startup, and dbcontext was not updated in production environment.

Changed my ConnectionString to Production and runned Update-Database, and problem solved.