MVC RAZOR assign javascript variable to C# variable

Question

Is it possible to assign javascript variable to c# variable in mvc razor view? e.g.

Also

Answer 1

No.

C# runs on the server; Javascript runs on the client.
It does not make sense to have them interact.

You should use AJAX.

Answer 2

The short and long answer is: NO.

All these scenarios should be covered by AJAX calls to the server