1. Be sure to announce your disgust with the entire team regularly, especially if the rest of management thinks everything is going great.

    

Roslyn analyzers inspect your code for style, quality, maintainability, design and other issues. Because they are powered by the .NET Compiler Platform, they can produce warnings in your code as you type even before you’ve finished the line. In other words, you don’t have to build your code to find out that you made a mistake. Analyzers can also surface an automatic code fix through the Visual Studio light bulb prompt that allows you to clean up your code immediately. 

This unexpected app port is arrives courtesy of the Uno Platform. They took the source code for Windows’s default Calculator app (which Microsoft made open source last year) and got it up and running on Linux desktops. 

@if (HotelRoomModel.HotelRoomImages.Count > 0)
{
    var serial = 1;
    foreach (var roomImage in HotelRoomModel.HotelRoomImages)
    {
        <div class="col-md-2 mt-3">
            <div class="room-image" style="background: url('@roomImage.RoomImageUrl') 50% 50%; ">
                <span class="room-image-title">@serial</span>
            </div>
            <button type="button"
                    @onclick="()=>DeletePhoto(roomImage)"
                    class="btn btn-outline-danger btn-block mt-4">Delete</button>
        </div>
        serial++;
    }
}

@code
{
    private const string UploadFolder = "Uploads";

    private void DeletePhoto(HotelRoomImageDTO imageDto)
    {
        var imageFileName = imageDto.RoomImageUrl.Replace($"{UploadFolder}/", "", StringComparison.OrdinalIgnoreCase);
        if (HotelRoomModel.Id == 0 && Title == "Create")
        {
            FileUploadService.DeleteFile(imageFileName, WebHostEnvironment.WebRootPath, UploadFolder);
            HotelRoomModel.HotelRoomImages.Remove(imageDto);
        }
    }
}

@code
{
    private List<string> DeletedImageFileNames = new List<string>();

    private void DeletePhoto(HotelRoomImageDTO imageDto)
    {
        var imageFileName = imageDto.RoomImageUrl.Replace($"{UploadFolder}/", "", StringComparison.OrdinalIgnoreCase);
        if (HotelRoomModel.Id == 0 && Title == "Create")
        {
            // ...              
        }
        else
        {
            // Edit Mode
            DeletedImageFileNames.Add(imageFileName);
            HotelRoomModel.HotelRoomImages.Remove(imageDto); // Update UI
        }
    }

    private async Task HandleHotelRoomUpsert()
    {
        // ...
 
        if (HotelRoomModel.Id != 0 && Title == "Update")
        {
            // Update Mode
            var updatedRoomDto = await HotelRoomService.UpdateHotelRoomAsync(HotelRoomModel.Id, HotelRoomModel);

            foreach(var imageFileName in DeletedImageFileNames)
            {
                FileUploadService.DeleteFile(imageFileName, WebHostEnvironment.WebRootPath, UploadFolder);
            }

            // await AddHotelRoomImageAsync(updatedRoomDto);
            await JsRuntime.ToastrSuccess($"The `{HotelRoomModel.Name}` updated successfully.");
        }
        else
        {
           // ... 
        }
    }
}

.spinner {
  border: 16px solid silver !important;
  border-top: 16px solid #337ab7 !important;
  border-radius: 50% !important;
  width: 80px !important;
  height: 80px !important;
  animation: spin 700ms linear infinite !important;
  top: 50% !important;
  left: 50% !important;
  transform: translate(-50%, -50%);
  position: absolute !important;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

@code
{
    private bool IsImageUploadProcessStarted;

    private async Task HandleImageUpload(InputFileChangeEventArgs args)
    {
        try
        {
            IsImageUploadProcessStarted = true;
            // ...
        }
        finally
        {
            IsImageUploadProcessStarted = false;
        }
    }
}

<InputFile OnChange="HandleImageUpload" multiple></InputFile>
<div class="row">
@if (IsImageUploadProcessStarted)
{
    <div class="col-md-12">
        <span><i class="spinner"></i> Please wait.. Images are uploading...</span>
    </div>
}

@using BlazorServer.App.Pages.Components

<Confirmation @ref="Confirmation1"
    OnCancel="OnCancelDeleteImageClicked"
    OnConfirm="@(()=>OnConfirmDeleteImageClicked(ImageToBeDeleted))">
    <div>
        Do you want to delete @ImageToBeDeleted?.RoomImageUrl image?
    </div>
</Confirmation>

    private Confirmation Confirmation1;
    private HotelRoomImageDTO ImageToBeDeleted;

    private void OnCancelDeleteImageClicked()
    {
        // Confirmation1.Hide();
    }

    private void DeletePhoto(HotelRoomImageDTO imageDto)
    {
        ImageToBeDeleted = imageDto;
        Confirmation1.Show();
    }

    private void OnConfirmDeleteImageClicked(HotelRoomImageDTO imageDto)
    {

<td>
    <NavLink href="@($"hotel-room/edit/{room.Id}")" class="btn btn-primary">Edit</NavLink>
    <button class="btn btn-danger" @onclick="()=>HandleDeleteRoom(room)">Delete</button>
</td>

<Confirmation @ref="Confirmation1"
    OnCancel="OnCancelDeleteRoomClicked"
    OnConfirm="OnConfirmDeleteRoomClicked">
    <div>
        Do you want to delete @RoomToBeDeleted?.Name?
    </div>
</Confirmation>

@code
{
    private List<HotelRoomDTO> HotelRooms = new List<HotelRoomDTO>();
    private HotelRoomDTO RoomToBeDeleted;
    private Confirmation Confirmation1;

    private void OnCancelDeleteRoomClicked()
    {
        // Confirmation1.Hide();
    }

    private void HandleDeleteRoom(HotelRoomDTO roomDto)
    {
        RoomToBeDeleted = roomDto;
        Confirmation1.Show();
    }

    private async Task OnConfirmDeleteRoomClicked()
    {
        if(RoomToBeDeleted is null)
        {
            return;
        }

        await HotelRoomService.DeleteHotelRoomAsync(RoomToBeDeleted.Id);
        HotelRooms.Remove(RoomToBeDeleted); // Update UI
    }

An exception occurred while iterating over the results of a query for context type 'BlazorServer.DataAccess.ApplicationDbContext'.
System.InvalidOperationException: A second operation was started on this context before a previous operation completed.
This is usually caused by different threads concurrently using the same instance of DbContext.
For more information on how to avoid threading issues with DbContext, see https://go.microsoft.com/fwlink/?linkid=2097913.

JavaScript is a dynamically typed language which comes with great power of expression, but it also comes with almost no help from the compiler. For this reason we feel very strongly that any code written in JavaScript needs to come with a strong set of tests. We have built many features into Angular which make testing your Angular applications easy. With Angular, there is no excuse for not testing. 

The .NET Portability Analyzer is a free Visual Studio Add-in (or console app) that will give you a detailed report on how portable your code is. 

Take your Linux development experience in Windows to the next level with WSL and Visual Studio Code Remote 

• XAML designer for UWP - control properties not displayed
• UWP XAML designer doesn't update elements on updating XAML code
• XAML properties and document structure
• Properties window not showing the properties when clicking an object
• Unable to see properties of any items
• Installation error when trying to connect to the Mac: "The Xamarin.iOS version installed on 'x' (12.8.0.2) is newer than your version".
• Fixed right click solution name in titlebar VS crash bug.
• Improved performance for customers with the Azure workload installed.
• Corrected errors during restore and build on SDK-based projects that use 3rd party SDKs to target UWP platforms.
• Fixed a bug in C# compiler where it was not properly warning customers about incomplete interface implementations.
• Improved error messaging in Visual Studio Tools for Kubernetes.
• Fixed error when adding a comment in PR for SymbolCheck.