Removing cookie on logout causing Server status code 400 netcore 6.0

Question

I am attempting to remove the session cookie on logout, resulting in a 400 error.

LoginPartial.cshtml


@if(User.Identity.IsAuthenticated)
{
    <form method="post" class="form-inline" asp-page="/Logout">
        <button id="Button" type="submit" name="submit" formmethod="post" class="btn">Logout</button>
    </form>
}else
{
    <a class="btn btn-link" asp-page="/Login">Login</a>
}

and the Logout.cshtml.cs looks like this:

    namespace WebApp.Pages
{
    public class LogoutModel : PageModel
    {
        public async Task<IActionResult> OnPostAsync(){
            await HttpContext.SignOutAsync("MyCookieAuth");
            return RedirectToPage("../");
        }

    }
}

The Cookies and claims all work well, as well as the User Identify Authentication. (net6.0)

Answer 1

the Logout.cshtml.cs looks like this:

    namespace WebApp.Pages
{
    public class LogoutModel : PageModel
    {
        public async Task<IActionResult> OnPostAsync(){
            await HttpContext.SignOutAsync();
            HttpContext.Response.Cookies.Remove("MyCookieAuth");
            return RedirectToPage("../");
        }

    }
}