I make a project by
File -> New -> Project -> Visual C# -> Web -> ASP.NET Core Web Application
(.NET Core) -> Empty -> OK
But there is no solution and src directory and also no project.json and web.config etc.
I reference a book that uses Visual Studio 2015. The book's example has all files and directories I told. But I don't(I'm using VS 2017 since I can't find .NET Core for VS 2015).
How can I make those files and directories ?? Do I make these by manually?
The .NET Core was changing its internals with a slightly fast pace (although it seems it has settled down now), thus making many of the tutorials out there obsolete. Since mid-2016, the project.json has been dumped in favor of "your-app-name".csproj file.
If you are following a tutorial or a book, then for anything you are supposed to write in the project.json, you must now write it in the csproj file with a slightly different format.
If I have to mess with project.json when following tutorials, I use this official migration guide.
The .NET Core (and other teams) have decided to drop project.json and go back to MSBuild and *.csproj.
So there is no project.json nor global.json in .net core stack any more.
The alternative for project.json is *.csproj and for global.json is *.sln.
Old csproj to new csproj: Visual Studio 2017 upgrade guide
for more info
Update: (based on Stajs comment)
global.json is still in the stack, but neutered to only defining the SDK version.