Data Model in Umbraco

Questions
1

Hallo everybody,

I use a specific data model (classes) that I use to fill with Json-Data (Deserialize over Newtonsoft).

At the moment I define this classes in the template with

@function{

public class Product
    {
        public string ProductID { get; set; }
        public string ProductName { get; set; }
        public string ProductCategory { get; set; }
} 

}

I would like to put this model somewhere in the project. So I created a folder “Models” in the root folder of Umbraco.

I tried to use that model by putting the folloing using-directive in the template.

@using umbraco.Models;

This does not seem to work. What do I have to do?

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/105587-data-model-in-umbraco