I have the following line of code in an ASP.Net MVC app that I am trying to modify for a user at my company.

<button type="button" class="btn btn-primary btn-sm" data-toggle="modal" data-target="#AddFacilityModal" data-backdrop="static">Add Facility</button>

I assume that AddFacilityModal would be the name of the form that the button is supposed to show and I tried to put the a .cshtml (Razor) page with the rest of the Razor pages but I got a 404 Cannot Find error. Where in my app should I put the code for the form?

Any help would be greatly appreciated.

Thanks,
Donald