[![enter image description here](https://i.stack.imgur.com/4OGPM.png)](https://i.stack.imgur.com/4OGPM.png)

These red squiggly lines say `cannot find module 'angular2/core'`,`cannot find module 'angular2/router'`,`cannot find module 'angular2/http'`.
I checked other posts in [SO](https://stackoverflow.com/questions/34312869/cannot-find-module-angular2-core-in-visual-studio-2015-update-1) but it seems they have no appropriate answer.

I also added a reference to the `d.ts` files as seen below but still not working.
[![enter image description here](https://i.stack.imgur.com/Rwn1V.png)](https://i.stack.imgur.com/Rwn1V.png)

Other posts say that I need to configure something in the `tsconfig.json` file but I am using Visual Studio and I see no need to use the tscompiler suggested by the angular team because Visual Studio should be able to compile ts files automatically.

Am I missing something? 

**Is the `tsconfig.json` still required even if you use Visual Studio?**

**How do I get rid of these squiggly lines?** 

Thanks!

(I am using Visual Studio 2015 and latest Typescript engine)

UPDATE:
I am not sure what exactly is the npm package manager. But I have a pre-built `package.json` file that was created when the project was created. I use this file for installing npm packages.
[![enter image description here](https://i.stack.imgur.com/GLaiz.png)](https://i.stack.imgur.com/GLaiz.png)