Web-Development-with-Blazor-Second-Edition/Chapter07/MyBlog/Components/RazorComponents/Alert.razor

<div class="@($"alert alert-{Style.ToString().ToLower()}")" role="alert">
    @ChildContent
</div>
@code{
    [Parameter]
    public RenderFragment ChildContent { get; set; }      =@<b>This is a default value</b>;
    [Parameter]
    public AlertStyle Style { get; set; }
    public enum AlertStyle
    {
        Primary,
        Secondary,
        Success,
        Danger,
        Warning,
        Info,
        Light,
        Dark
    }
}