Develop Reference

NETSDK1073: The FrameworkReference 'Microsoft.AspNetCore.App' was not recognized

I use .NET Core 5.0.100-preview.7.20366.6 , Blazor webassembly, Microsoft Visual Studio Community 2019 Preview Version 16.7.0 Preview 6.0
file foo.csproj
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
<RuntimeIdentifier>browser-wasm</RuntimeIdentifier>
<UseBlazorWebAssembly>true</UseBlazorWebAssembly>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="DevExpress.Blazor" Version="20.1.5" />
<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="5.0.0-preview.7.20365.19" />
<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="5.0.0-preview.7.20365.19" PrivateAssets="all" />
<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Authentication" Version="5.0.0-preview.7.20365.19" />
<PackageReference Include="System.Net.Http.Json" Version="5.0.0-preview.7.20364.11" />
</ItemGroup>
</Project>
When press F5 to run debug:
Error
NETSDK1073: The FrameworkReference 'Microsoft.AspNetCore.App' was not
recognized
How to fix it?

For .NET Core 3.1 apps, adding <GenerateErrorForMissingTargetingPacks>false</GenerateErrorForMissingTargetingPacks> to the .csproj file will prevent this error:
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
<GenerateErrorForMissingTargetingPacks>false</GenerateErrorForMissingTargetingPacks>
</PropertyGroup>

I just resolved the same issue with this process:
-Close the project
-Delete the bin and obj folders in the Blazor.Client project
-Reopen the project
-Open Nuget Console: Tools -> Nuget Package Manager -> Nuget Package Manager Console
-Enter dotnet restore in the command line
After that I hit F5 and the project compiled, and started

code coverage in gitlab ci/cd for .net applications?

I recently started working with C# and I am working on one of the legacy system we have. I am trying to figure out what is the code coverage for this legacy system. Here is my Sample.UnitTests.csproj file:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp3.0</TargetFramework>
<IsPackable>false</IsPackable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="AutoFixture.AutoMoq" Version="4.2.1" />
<PackageReference Include="AutoFixture.NUnit3" Version="4.2.1" />
<PackageReference Include="coverlet.msbuild" Version="2.9.0">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
<PackageReference Include="Moq" Version="4.8.2" />
<PackageReference Include="nunit" Version="3.9.0" />
<PackageReference Include="NUnit3TestAdapter" Version="3.9.0" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
<PackageReference Include="WireMock.Net" Version="1.0.4.17" />
<PackageReference Include="Utf8Json" Version="1.3.7" />
<FrameworkReference Include="Microsoft.AspNetCore.App" />
<PackageReference Include="System.Buffers" Version="4.5.0" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="../Sample/Sample.csproj" />
</ItemGroup>
<ItemGroup>
<DotNetCliToolReference Include="dotnet-reportgenerator-cli" Version="4.2.10" />
</ItemGroup>
</Project>
I did some research and found out we can use coverlet which can generate cobertura style report. I followed exactly as mentioned here on my mac box and everything works fine and I can see the report being generated correctly on my console and also it generates index.html file which we can use to visualize as well.
dotnet add package coverlet.msbuild
dotnet restore
dotnet build
dotnet test /p:CollectCoverage=true
dotnet test /p:CollectCoverage=true /p:CoverletOutputFormat=cobertura /p:Exclude="[xunit*]\*" /p:CoverletOutput="./TestResults/"
dotnet reportgenerator "-reports:TestResults/coverage.cobertura.xml" "-targetdir:TestResults/html" -reporttypes:HTML;
Now since we use gitlab ci/cd pipeline for our project - Is there any way I can make this part of my .gitlab-ci.yml file so that it can generate report automatically for me whenever build happens and everybody in my team can see it successfully. Since as of now it's all manual as I need to run those above commands on my local mac box and I can see it from my console only by clicking index.html file.
These are my stages of .gitlab-ci.yml file as shown below. If needed I can provide my yml file as well but any simple example where it can demonstrate how can I do this then it will be of great help. I tried searching a lot and couldn't find this at all on how can I do it through gitlab pipeline which uses coverlet and cobertura style report for .net applications..
stages:
- test
- publish
- increment
- deploy
- integrationTests
- release
Can this be done through webhook as well if needed?

May need to use the actual GUID instead of *.
stages:
- test
- publish
- increment
- deploy
- integrationTests
- release
build-and-test:
stage: test
image: mcr.microsoft.com/dotnet/sdk:6.0
script:
- dotnet add package coverlet.msbuild
- dotnet restore
- dotnet build
- 'dotnet test --collect:"XPlat Code Coverage"'
artifacts:
reports:
cobertura: TestResults/*/coverage.cobertura.xml
GitLab can diff with previous Cobertura reports.
If you want HTML instead, simply include it among the artifacts. May also publish it to GitLab Pages.

The other answer didn't work for me because of folder confusion. Coverlet puts the test results in folders relative to the respective unit test projects. So
Either you have to tell gitlab to search for TestResults folders everywhere via wildcards, by setting path to something like ./**/TestResults/**/coverage.cobertura.xml.
Or you provide the --results-directory option (short version -r), to tell dotnet test where to put those files in the first place.
I went for the second option, gathering all results in a cobertura folder in the repo root. Here is a full, valid .gitlab-ci.yml for running tests for merge requests:
image : mcr.microsoft.com/dotnet/sdk:6.0
stages:
- test
test:
stage: test
only:
- merge_requests
script:
- 'dotnet test DotNetSolution
--collect:"XPlat Code Coverage"
-r cobertura'
artifacts:
reports:
coverage_report:
coverage_format: cobertura
path: cobertura/*/coverage.cobertura.xml

Build fail for Asp.Net Core 3 (Blazor client side)

I've start to develop a web application with ASP.NET Core 3 and Blazor framework.
During few days/weeks, I could build my application.
Since preview 5 announced, I couldn't build my application (with dotnet build command).
I've the next error:
C:\Users\a\.nuget\packages\microsoft.aspnetcore.blazor.build\3.0.0-preview5-19227-01\targets\Blazor.MonoRuntime.targets(439,5): error MSB3073: The command "dotnet "" -l
-o "D:\Repos\IdeaStudio.Website.Client\obj\Debug\netstandard2.0\linker/"
-x "C:\Users\a\.nuget\packages\microsoft.aspnetcore.blazor.build\3.0.0-preview5-19227-01\targets\BuiltInBclLinkerDescriptor.xml"
-x "D:\Repos\IdeaStudio.Website.Client\obj\Debug\netstandard2.0\linker.descriptor.xml"
-a "C:\Users\a\.nuget\packages\microsoft.aspnetcore.blazor\3.0.0-preview5-19227-01\lib\netstandard2.0\Microsoft.AspNetCore.Blazor.dll"
-a "C:\Users\a\.nuget\packages\microsoft.aspnetcore.components\3.0.0-preview5-19227-01\lib\netstandard2.0\Microsoft.AspNetCore.Components.dll"
-a "C:\Users\a\.nuget\packages\microsoft.aspnetcore.components.browser\3.0.0-preview5-19227-01\lib\netstandard2.0\Microsoft.AspNetCore.Components.Browser.dll"
-a "C:\Users\a\.nuget\packages\microsoft.extensions.dependencyinjection\3.0.0-preview5.19227.9\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.dll"
-a "C:\Users\a\.nuget\packages\microsoft.extensions.dependencyinjection.abstractions\3.0.0-preview5.19227.9\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.Abstractions.dll"
-a "C:\Users\a\.nuget\packages\microsoft.jsinterop\3.0.0-preview5.19227.9\lib\netstandard2.0\Microsoft.JSInterop.dll"
-a "C:\Users\a\.nuget\packages\mono.webassembly.interop\3.0.0-preview5.19227.9\lib\netstandard2.0\Mono.WebAssembly.Interop.dll"
-a "C:\Users\a\.nuget\packages\system.componentmodel.annotations\4.6.0-preview5.19224.8\lib\netstandard2.0\System.ComponentModel.Annotations.dll"
-a "D:\Repos\IdeaStudio.Website.Client\obj\Debug\netstandard2.0\IdeaStudio.Website.Client.dll"" exited with code 1.
[D:\Repos\IdeaStudio.Website.Client\IdeaStudio.Website.Client.csproj]
My csproj looks like :
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netstandard2.0</TargetFramework>
<RestoreAdditionalProjectSources>
https://dotnet.myget.org/F/aspnetcore-dev/api/v3/index.json;
https://dotnet.myget.org/F/blazor-dev/api/v3/index.json;
</RestoreAdditionalProjectSources>
<LangVersion>7.3</LangVersion>
<RazorLangVersion>3.0</RazorLangVersion>
<TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
<OutputType>Exe</OutputType>
<TargetFrameworks>netstandard2.0</TargetFrameworks>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.5.1" />
<PackageReference Include="Microsoft.AspNetCore.Blazor" Version="3.0.0-preview5-19227-01" />
<PackageReference Include="Microsoft.AspNetCore.Blazor.Build" Version="3.0.0-preview5-19227-01" PrivateAssets="all" />
<PackageReference Include="Microsoft.AspNetCore.Blazor.DevServer" Version="3.0.0-preview5-19227-01" PrivateAssets="all" />
</ItemGroup>
</Project>
I did not understand for several days until...

This issue on the Mono GitHub is related.
Basically, as far as I understand it, somewhere in Mono the IL Linker fails and throws this cryptic error message. We can see hints to this in your error message.
As of now, michaelccote on GitHub solved the problem by adding the <BlazorLinkOnBuild>false</BlazorLinkOnBuild> element inside the <PropertyGroup>...</PropertyGroup> tags of the .csproj file

Maybe when I did the Visual Studio / .NET Core 3 preview 5
dotnet cli can't build an application with a csproj which contains <TargetFramework> and <TargetFrameworks> properties...

When you are using Blazor WebAssembly, ASP.NET Core 3.1 please navigate to yoursolution/yourproject.Client/ and edit yourproject.Client.csproj-File. Add the following line:
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
[...]
<BlazorWebAssemblyEnableLinking>false</BlazorWebAssemblyEnableLinking>
</PropertyGroup>
[...]
</Project>

PageFactory not working in VSCode

I am standing up a NUnit framework in VSCode but am running into an issue when setting up PageFactory within my page ctor. I have added DotNetSeleniumExtras.PageObjects to my .csproj but am unable to call PageFactory.InitElements(driver,this) even with the using SeleniumExtras.PageObjects in place.
I have seen the articles/videos regarding PageObjects being removed from .Net Core but I thought (perhaps naively) that DotNetSeleniumExtras would solve this.
Has anyone gotten this working since PageObjects were pulled out into their own project?
Here are the steps I've followed in getting setup:
1) Install VSCode
2) Create New Folder
3) Open Folder in VSCode
4) Install .Net Core
5) Install Extensions:
C#
.Net Core Test Explorer
Show Test Results (TDD Support for NUnit .Net Core)
6) Add NUnit Template:
dotnet new -i NUnit3.DotNetNew.Template
7) Create a project:
dotnet new nunit
8) Add Packages:
dotnet add package Selenium.Webdriver
dotnet add package Selenium.Support
dotnet add package DotNetSeleniumExtras.PageObjects
dotnet add package NUnit
dotnet add package NUnit3TestAdapter
dotnet add package Microsoft.NET.Test.Sdk
.csproj Contents
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp2.0</TargetFramework>
<IsPackable>false</IsPackable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="DotNetSeleniumExtras.PageObjects" Version="3.11.0" />
<PackageReference Include="nunit" Version="3.10.1" />
<PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.6.1" />
<PackageReference Include="Selenium.Support" Version="3.11.0" />
<PackageReference Include="Selenium.Webdriver" Version="3.11.0" />
</ItemGroup>
</Project>
Page.cs
using NUnit.Framework;
using System;
using SeleniumExtras.PageObjects;
using OpenQA.Selenium;
namespace IS.Pages
{
class Landing
{
public Landing()
{
PageFactory.InitElements(DriverUtil.driver,this);
}
// Start Search Button
[FindsBy(How = How.CssSelector, Using = "body > main > header > div.background-wrapper > div > div > div:nth-child(1) > div > a")]
public IWebElement AdvancedSearch {get; set;}

Sigh,
I didn't look at the Dependancies for DotNetSeleniumExtras. Not supported (yet) by .Net Core

How to create a new dotnet core application that has both auth and EF?

I can create a new dotnetcore app that has authentication/identity using the command line:
dotnet new mvc --auth Individual
How can i include entity framework in the project also?

TL;DR
You already have it in your project
Long form answer
After creating your application, it should have Entity Framework as a dependency. I'm assuming that you're running the .NET Core 2.0 SDK.
Here's the output from my machine
$ dotnet new mvc --auth Individual --name testForStackOverflow
The template "ASP.NET Core Web App (Model-View-Controller)" was created successfully.
This template contains technologies from parties other than Microsoft, see https://aka.ms/template-3pn for details.
Processing post-creation actions...
Running 'dotnet restore' on testForStackOverflow/testForStackOverflow.csproj...
Restoring packages for testForStackOverflow/testForStackOverflow.csproj...
Restore completed in 40.17 ms for testForStackOverflow/testForStackOverflow.csproj.
Restore completed in 40.17 ms for testForStackOverflow/testForStackOverflow.csproj.
Restore completed in 25.25 ms for testForStackOverflow/testForStackOverflow.csproj.
Generating MSBuild file testForStackOverflow/obj/testForStackOverflow.csproj.nuget.g.props.
Generating MSBuild file testForStackOverflow/obj/testForStackOverflow.csproj.nuget.g.targets.
Restore completed in 2.84 sec for testForStackOverflow/testForStackOverflow.csproj.
Restore succeeded.
I then look a look at the csproj which was generated:
$ cd testForStackOverflow/
~/testForStackOverflow$ ls
app.db Data Startup.cs
appsettings.Development.json Extensions testForStackOverflow.csproj
appsettings.json Models Views
bower.json obj wwwroot
bundleconfig.json Program.cs
Controllers Services
~/testForStackOverflow$ cat testForStackOverflow.csproj
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp2.0</TargetFramework>
<UserSecretsId>aspnet-testForStackOverflow-AD382505-1A70-4A75-8059-1E0E3897A088</UserSecretsId>
</PropertyGroup>
<ItemGroup>
<None Update="app.db" CopyToOutputDirectory="PreserveNewest" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.0.0" PrivateAssets="All" />
<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.0.0" PrivateAssets="All" />
</ItemGroup>
<ItemGroup>
<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
<DotNetCliToolReference Include="Microsoft.Extensions.SecretManager.Tools" Version="2.0.0" />
<DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.0" />
</ItemGroup>
</Project>
The important line of the csproj is here:
<PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
This is a reference to the ASP.NET Core metapackage. This package contains all of the common ASP.NET Core NuGet packages, including Entity Framework Core - as per this screen shot from NuGet (captured a few moments ago)
This means that part of the package restore operation included restoring EF Core into your project.
I would say that you should take a look at this documentation for EF Core - the link should take you directly to the section labelled "The Model". You don't need the stuff in the preceding section (labelled "Get Entity Framework Core") as you already have it.
Of course, if you're using version 1.x of the .NET Core SDK, then it's a slightly different story.