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Visual Studio 2017 publish ASP.NET Core app with C# 7.2

I have a Asp.Net MVC Core website that's using public static async Task Main(). For that to work I've set the language version to C# 7.2 (in the properties -> build -> advanced dialog, double checked in the csproj) for both Debug and Release build configurations.
App builds and starts fine in both Debug and Release mode.
Now, I'm trying to publish it to an Azure Website directly from Visual Studio 2017 15.5.2 (with WebDeploy) and I get this:
Program.cs(17,29): Error CS8107: Feature 'async main' is not available
in C# 7.0. Please use language version 7.1 or greater. CSC(0,0): Error
CS5001: Program does not contain a static 'Main' method suitable for
an entry point
In the output window I see it's running C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin\Roslyn\csc.exe with some flags, probably one of them is wrong?
Anyone know if this is a known issue or I'm doing something wrong?

This appears to be a bug in Visual Studio.
Adding this line to main property group in the .csproj file resolved the issue for me:
<LangVersion>latest</LangVersion>
The issue was also reported here in the ASP.NET Home repository.

Not an answer, per se, but for what it's worth async Main is just syntactic sugar. Behind the scenes Roslyn just adds the standard void Main wrapper construction:
static void Main(object[] args)
{
MainAsync(args).GetAwaiter().GetResult();
}
static async Task MainAsync(object[] args)
{
// your code
}
It's probably not worth your time trying to get the server on the same page C# version-wise, just to save literally three lines of code.

Opening a solution with msbuildworkspace gives diagnostics errors without details

I am trying to analyse a solution with Roslyn, with MSBuildWorkspace.
The solution is a new solution, with 2 class library projects in them, one referencing the other.
They are created in Visual Studio 2017, .Net 4.6.2.
When I open the solution, I receive two generic errors in workspace.Diagnostics, both are :
Msbuild failed when processing the file 'PathToProject'
There is nothing more in the diagnostics or output window, to indicate WHY it failed to process the project file.
The code for opening the solution:
namespace RoslynAnalyse
{
class Program
{
static void Main(string[] args)
{
LocalAnalysis();
}
private static void LocalAnalysis()
{
var workspace = MSBuildWorkspace.Create();
var solution = workspace.OpenSolutionAsync(#"D:\Code\Roslyn\RoslynAnalyse\SolutionToAnalyse\SolutionToAnalyse.sln").Result;
var workspaceDiagnostics = workspace.Diagnostics;
}
}
}
The version of Microsoft.CodeAnalysis is 2.0.0.0.
Does anybody have any idea why MSBuild failed, how I can get more information ?

When MSBuildWorkspace fails to open a project or solution this way, it is almost always because the application using MSBuildWorkspace does not include the same binding redirects that msbuild.exe.config has in it.
MSBuild uses binding redirects to allow tasks (typically already compiled C# code using possibly different versions of msbuild API libraries) to all use the current msbuild API's. Otherwise, msbuild gets runtime load failures.
The solution is to add an app.config file to your project and copy the binding redirects (the assemblyBinding section of the msbuild.exe.config file) into your file.

Xamarin Android: Failed to resolve type MvvmCross.Core.ViewModels.IMvxAppStart

Trying to start a project (Xamarin Android) of another developer.
The application is compiled successfully, first view shown correctly, it's okay.
But after a moment, then I get an error:
MvvmCross.Platform.Exceptions.MvxIoCResolveException: Failed to resolve type MvvmCross.Core.ViewModels.IMvxAppStart
Visual studio doesn't show any more information about the error, the debugger points to an empty string in MvxSimpleIoCContainer class.
Before opening the project reinstall VS, Xamarin, Android SDK etc.
This project is absolutely correct, on another computer was working perfectly and without this exception. Unfortunately i have no access to those computer.
I will be glad to any prompts.
Error mesage:
Visual Studio after clicking "break":

I had the same issue,my problem was in the core'dll' app.cs
namespace Core
{
public class App : MvxApplication
{
public override void Initialize()
{
CreatableTypes()
.EndingWith("Service")
.AsInterfaces()
.RegisterAsLazySingleton();
RegisterAppStart<ViewModels.FirstViewModel>();
I had no RegisterAppStart<ViewModels.FirstViewModel>(); line, change to use your first view.

Start windows service on install without setup project

I have developed a windows service, but need it to start automatically on install. Problem is that every tutorial I found is showing me through the Setup Project. There is a fantastic 3 part tutorial HERE that I used to convert my app to a service, but I don't have the Setup Project in my other project types. Can I do this programatically or is there a way I can get the Setup Project project type?

In your Installer class, add a handler for the AfterInstall event. You can then call the ServiceController in the event handler to start the service.
public ServiceInstaller()
{
//... Installer code here
this.AfterInstall += new InstallEventHandler(ServiceInstaller_AfterInstall);
}
void ServiceInstaller_AfterInstall(object sender, InstallEventArgs e)
{
using (ServiceController sc = new ServiceController(serviceInstaller.ServiceName))
{
sc.Start();
}
}
Now when you run InstallUtil on your installer it will install and then start up the service.
MSDN link for more details

I believe Topshelf project has built-in service Installer/Uninstaller. when integrated in the application, it can be installed as a service through simple command from application itself, for example we can easily install and start myService.exe with myService.exe install start command.
we can simply create a self installing service, here is an Example:
public class ServiceClass
{
public ServiceClass()
{
}
public void Start() { }
public void Stop() { }
}
public class Program
{
public static void Main(string[] args)
{
//we can simply install our service by setting specific commands for same or install it directly from command line or from another process
if (args.Length == 0)
{
var processName = Process.GetCurrentProcess().ProcessName + ".exe";
var install = Process.Start(processName, "install start");
install.WaitForExit();
return;
}
HostFactory.Run(x =>
{
x.Service<ServiceClass>(s =>
{
s.ConstructUsing(name => new ServiceClass());
s.WhenStarted(tc => tc.Start());
s.WhenStopped(tc => tc.Stop());
});
x.RunAsLocalSystem();
x.SetDescription("Topshelf Host");
x.SetDisplayName("TopShelf");
x.SetServiceName("TopShelf");
});
}
}
you can get Topshelf through PM> Install-Package Topshelf Nuget command.

Best thing to do is to add on the Installer Projects Extension!
The Setup project type was deprecated after VS 2010, but following feedback Microsoft have brought back a new version for VS 2013.
Install the new Installer Projects Extension from Microsoft: https://visualstudiogallery.msdn.microsoft.com/9abe329c-9bba-44a1-be59-0fbf6151054d
This should work for any non-express version of Visual Studio 2013 (including the new free Community Edition SDK)
Then you can just follow the same instructions as for the VS 2010 setup projects :)
There isn't an easy option for VS2012 (you could try an installer with WiX I guess, but thats a lot to learn!)
I'm not sure if InstallShield LE (free version for VS2012) would work for this situation, but you could give it a try.
You can always change the startup type of a service after installation remember. (Control Panel -> Administrative Tools -> Services -> right click service -> Properties -> change "Startup Type" to "Automatic" )

If you are targeting Windows 7 and up, Powershell is installed by default. One option is to run a simple powershell script which installs the service, starts it, and sets the service to start automatically if the machine is rebooted:
InstallUtil yourService.exe
Start-Service yourService
Set-Service yourService -startuptype "Automatic"

Expression Blend + Sketchflow - Addin?

Has anyone been able to get an extension up and running Expression Blend + Sketchflow preview? I'm looking for an example project.
I was following this article, but it is a bit outdated.
So far I:
Created a .Net 4.5 class library project
Added a reference to the Microsoft.Expression.Extensibility.dll in the new Blend Preview directory
Set my project to deploy to the appropriate Addins directory
Setup Visual Studio to run the new Blend.exe for debugging
Hooked up MEF and inherited IPlugin as in the example
But my plugin doesn't seem to load and no breakpoints are hit.

After reading your question I decided to start working on a new version of that tutorial.
A few things to get you started right away.
I've created the basic plugin like this:
using System.ComponentModel.Composition;
using Microsoft.Expression.Extensibility;
namespace Demo.Extension
{
[Export(typeof (IPackage))]
public class Demo : IPackage
{
public void Load(IServices services)
{
}
public void Unload()
{
}
}
}
Make sure you:
place the plugins in ...\Blend Preview\extensions
run visual studio as administrator to be able to deploy to that folder during debug
implement the IPackage instead of IPlugin

Got it working by following the demo here.
I used the few modifications above, and put things in the Blend Preview directory.