Visual Studio Do not open new browser instance

when I try to run a web application in visual studio 2017RC on windows 10, it opens a new browser instance(in my case chrome). I’ve tried also with internet explorer, situation is same, and browser not signed in, but if I just manually run chrome it is signed in.
How to prevent visual studio to run a new browser instance on each time I run web application? When I press run website it should be opened in same window as previous application(just next tab)

Project template for Visual Studio 2015

I am trying to create a project template for Visual Studio 2015. I created a ASP.NET 5 class library (under the web section of Visual studio 2015) and used the option File->Export template. When I tried to create project using the exported template, only the .xproj file gets created. The files within the template and the dependencies are not getting added. But the same procedure works fine for normal class library project.
Am I missing something.?

Use Username instead of Email for identity in Asp.net mvc5

Whenever I create a new application with visual studio 2013 express for web and using the individual accounts authentication and i hit the register button I notice that it implements ‘Email’ instead of ‘Username’ and the same is in the LoginViewModel as it uses Email to Sign in instead of Username. How can i change this to use Username instead of the default Email without trouble? Also i would like to know how to convert the default ‘guid’ that is a string type to ‘id’ (integer type).