Index.cshtml.cs

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using RazorHtmlEmails.Common;

namespace RazorHtmlEmails.AspNetCore.Pages;

public class IndexModel : PageModel
{
    private readonly IRegisterAccountService _registerAccountService;

    public IndexModel(IRegisterAccountService registerAccountService)
    {
        _registerAccountService = registerAccountService;
    }

    public async Task OnGetAsync()
    {
        // In reality, you would have this on a POST and pass along user input and not just have the Confirm Account link be the Index page... but #Demoware
        await _registerAccountService.Register("testmctestyface@contoso.com", Url.Page("./Index"));
    }
}