Razor pages, return all checkboxes as a list of values

I want my checkboxes in a form to return as a list of all the values for selected checkboxes

foreach (string url in ListOfPhotoURLs)
    {
        <div class="form-check form-check-inline">
            <input asp-for="Input.ChosenPhotos" class="form-check-input" type="checkbox" id="PhotosChosen" value="@url">
            <img src="@url" alt="photo from url @url" width="250">
            <span class="text-danger" asp-validation-for="Input.ChosenPhotos"></span>
        </div>
    }

Where Input.ChosenPhotos is type List<string> and when the form is submitted I want my list to be populated with all of the values (url) that correspond with a checked checkbox

When I run I get an error that basically says checkboxes can only return a bool or string. Not a list of strings or bools.

Problem is my list is of inderterminet length so I cant have an input model that has an individual property for each checkbox.

I'm not sure what the optimal solution is here?

Im using Razor Pages btw