@using Microsoft.Extensions.Logging
@inject ILogger<Error> Logger
@inject IJSRuntime jsRuntime

<CascadingValue Value="this">
    @ChildContent
</CascadingValue>

@code {
    [Parameter]
    public RenderFragment? ChildContent { get; set; }

    public void ProcessError(Exception ex)
    {
        Logger.LogError("Error:ProcessError - Type: {Type} Message: {Message}", 
            ex.GetType(), ex.Message);
        jsRuntime.ToastrError("متاسفانه خطایی رخ داد");
        //StateHasChanged();
    }
}

<Error>
    <Router ...>
        ...
    </Router>
</Error>

@code {
    [CascadingParameter]
    public Error? Error { get; set; }

    private void CreatePost()
    {
        try
        {           
           throw new InvalidOperationException("پست ساخته نشد!");            
        }
        catch (Exception ex)
        {
            Error?.ProcessError(ex);
        }
    }
}