VRSystem/EasyTemplate.Blazor.Web/Components/Pages/Exception/404.razor

@namespace EasyTemplate.Blazor.Web
@layout ErrorLayout
@page "/error/{code:int}"
@attribute [ReuseTabsPage(Ignore = true)]

@code{
    [Parameter]
    public int Code { get; set; }

    public string Message { get; set; }

    protected override void OnParametersSet()
    {
        Message = Code switch
        {
            404 => "Page not found.",
            500 => "Internal server error.",
            _ => "An error occurred."
        };
    }
}