How to count the number of selected records from a database in C# ASP.NET?

Question

ASP.NET

Good day to all!
Actually a subject. Interested in solutions on the frontend side (razor view type) and backend in the controller somewhere.
I am sampling like this:

var files = from m in db.Files select m;
files = files.Where(s => s.TreatmentId == id);

Thanks in advance.

Answer 1

files.Count() obviously