Error publishing .NET MAUI project: the target "_GenerateAppxPackage" does not exist - visual-studio

I have a .NET MAUI project that was created with VS2022 Preview 2, and it builds without errors or warnings and works as expected in the debugger. Prior to updating Visual Studio to Version 17.4.0 Preview 4.0 I was able to publish the project as a sideloadable MSIX from within VS.
Since updating, I get the following error when I click Create in the Create App Packages wizard:
MSB4057 The target "_GenerateAppxPackage" does not exist in the project.
The error is listed against the MAUI project's .csproj file.
I've tried creating a separate new, default MAUI project in the new preview - this publishes ok and (as far as I can see) doesn't contain _GenerateAppxPackage anywhere within its files or project structure. So for now I'm assuming this isn't something new that was added with the preview.
I found some references to _GenerateAppxPackage on the web but they appear to refer to Azure integration. My project is a stand-alone data transformation app that doesn't even access the net.
I'm at a loss what to try next. I don't know what this target refers to, where it should "exist" within the project, or what it does. Can anyone help me understand the problem and/or point me to a solution?
Update: 2022-10-28:
I tried deleting the project structure and creating it from scratch with File -> New Project, then adding back only the .cs and .xaml files. Publishing the recreated project gives me the same error.
I also tried uninstalling the VS preview and re-downloading and installing it. Again, publishing the project gives me the same error.
I still have no idea what is causing this, or even where to start looking.

I faced with the same problem at Visual Studio 2022 17.4.0 (net6.0-windows10.0.19041.0).
The simplest solution for me was be using the command dotnet publish directly.
At root of project just write in terminal:
dotnet publish -f net6.0-windows10.0.19041.0 -c /p:RuntimeIdentifierOverride=win10-x64

I learned today that MAUI is now in the mainline Visual Studio 2022 edition, I've tried using that instead of the preview, and I can confirm that the problem goes away. I wish I'd known about this earlier...

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Unable to create Cross-Platform .NET Standard Plugin Templates project

I am trying to develop my own plugins in xamarin form. I installed Cross-Platform .NET Standard Plugin Templates in VS 2019. I can see in description Cross-Platform .NET Standard Plugin Templates works with 2017 and 2019.
When I try to create new project it keeps going on saying creating project.
When I look in the directory, I can see some files being generated.
It's an existing issue with VS2019
Creating a new Project with VS2019 shows missing references / they cant be loaded. Appeared after last VS Update.
If you wait long enough you can do the following :
Note- after last VS 2019 update- edit the csproj file and update the MSBuild.Sdk.Extras to version 2.0.54 so all dependencies load and the project will build.
UPDATE:
Had to download Visual studio 2017 to create the project

Visual Studio 2013 New Project .csproj not supported

When I try to create a new Windows Forms project, I get the " ....csproj cannot be opened because its project type (.csproj) is not supported by this version of the application" error. The .csproj file it is referring to is in AppData\Local\temp\randomname\Applicationname.csproj but that file does not actually get created.
I know that when this error crops up with opening projects created in previous versions, it's usually a missing library that is used by that particular project but for the life of me, I cannot figure out what library I could be missing here as it is a new project.
I have VS 2013 Ultimate installed with all components.
Running on Windows 8.1.
First confirm it is not a add-on or a problem with Visual Studio itself.
Try and start Visual Studio from the command line with devenv.exe /resetskippkgs and also try disable any IDE extensions temporarily to see if one of them might be stepping on something. Do these two things first to see if the problem lies with VS IDE. Of course try creating a project after you have done these two things and see if you get the same results.
I never figured out what the actual problem was but I've installed Update 5 which was only released less than two weeks ago and it's working fine now.

Namespace not found within the same project according to intellisense, yet project builds

I have a simple ASP.Net MVC project which for some reason has issues with intellisense. It is constantly giving me errors that namespaces local to the project can not be found, even though they do exist and the project will build fine. Here's an example:
It is very frustrating as this results in me having no intellisense available whatsoever. Has any one encountered a problem like this before, and do they know of a solution?
The project itself is an MVC4 website running in VS2013 in W8 under Paralells on a Macbook Air, should that have any effect on the problem.
As stated, I have no error messages to provide as the project builds and runs successfully, but please let me know if more details are required.
I had the same issue. Try removing your project from the solution and then add it again. It worked for me. Looks like a solution file quirk.
UPDATE: this is not a permanent fix as closing and reopening visual studio brings back the issue.
UPDATE 2: while looking to fix another issue where I couldn't change the default namespace of a project (I would get a System.Runtime.InteropServices.ExternalException), I found out that it was related to Xamarin tools for Visual Studio. I proceeded to completely uninstall Xamarin. It fixed my namespace renaming issue as well as the weird type or namespace not found / intellisense issue.
I had this same issue, seems to be something with the solution file and building the project as I could replicate the problem by simply creating a new project building then restarting visual studio.
Anyway I get around it at the moment by deleting the solution file and opening the project using the project file.
For anyone reading this in 2020, a fix that I've found that has worked for me is:
cleaning the solution and unloading the projects that have dependencies such as a web API depending on a data project and an application project (right click on the project in solution explorer and find "Unload Project"),
then reloading and building each project in the order of dependence such that they build successfully (right click on the unloaded project in solution explorer and find "Reload Project").
so in my case my data project does not depend on any other project so I reloaded and built that first, then the application project which depends on the data project and finally the web API project which depended on both data and application.

"This project is incompatible with the current version of Visual Studio"

I was getting the below message from Visual Studio 2010.
"This project is incompatible with the current version of Visual Studio"
One situation resulting in this error has already been posted here at Stackoverflow, but that question has been closed. I'm thinking it's a fairly generic problem. Since I have found a "solution", I'll post this question, and my solution as an answer.
If the message
This project is incompatible with the current version of Visual Studio
is due to an attempt to open a project targeting .Net 4.5, then the "solution" or workaround is to edit the .csproj file and change the TargetFrameworkVersion from "v4.5" to "v4.0". That at least allows the project to be loaded, although it may result in compiler errors if the program is dependent on 4.5 features.
VS 2012 has different project type support based on what you install at setup time and which edition you have. Certain options are available, e.g. web development tools, database development tools, etc. So if you're trying to open a web project but the web development tools weren't installed, it complains with this message.
This can happen if you create the project on another machine and try to open it on a new one. I figured it out trying to open an MVC project after I accidentally uninstalled the web tools.
I just got the same error message with a couple projects after installing Visual Studio 2015 Update 3. For me, the solution was to install .NET Core
In my case it was an incompatible Project Type. Editing project file and removing ProjectTypeGuids node resolved the issue of loading the project (I had already re-targeted the framework version as advised here).
Probably the project type is not supported in the (most likely) NEW version of VS, so you will have to adjust (update) the code to work properly (if possible), but at least you can see the content through VS.
I Resolved the issue by deleting the files in the below folder
%localappdata%\Microsoft\VisualStudio\12.0\ComponentModelCache
Source: https://forums.xamarin.com/discussion/70388/how-to-fix-incompatible-issue-after-visual-studio-2015-update-3
As for me, I realized there was another web project in the solution that my VS2017 was loading fine, so I copied over the ProjectTypeGuids element of it over to the project that wasn't loading. Its diff was:
- <ProjectTypeGuids>{E3E379DF-F4C6-4180-9B81-6769533ABE47};{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</ProjectTypeGuids>
+ <ProjectTypeGuids>{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</ProjectTypeGuids>
After this, it loads. Don't ask me why.
If you are getting the same error for a project which is actually an extension (.vsix), installing Microsoft Visual Studio 2012 SDK does the trick.
Go to tools -> Extensions and updates -> Online -> Search for project installer -> download
And relaunch Visual studio.
After installing Update 3 for Visual Studio 2015, I suddenly got the "This project is incompatible with the current version of Visual Studio" error message while opening my Cordova project (.jsproj Javascript project file)
To solve this:
Go to Programs & Features
Select the Microsoft Visual Studio 2015 installation and click Change
Click Modify
Install "HTML/Javascript (Apache Cordova) Update 10" of the Cross Platform Mobile Development section
For me, I got this same error in VS 2015 and just installed the VS 2015 update 1, though from another answer, VS is actually up to Update 3, now (after which, they got the error and had to install .NET Core). Had issues when it hit certain packages, like the Windows SDK ones, and had to point the installer back at the paths in my original CD, and for some, even that didn't work and had to skip them and re-download from an internet-connected computer, transfer them over, and run them later manually (computer was not connected to the internet to be able to download updated versions of the packages), but after doing all that and doing a reboot, the error was gone and my project loaded fine.
I had this issue and after hours of uninstalling and reinstalling I found out the issue in my instance.
The reason why I got this was down to the fact that I didn't have the correct extension.
In my case the ASP.net project (my startup) was the incompatible project and this was because I didn't have the following:
Microsoft ASP.NET and Web Tools
Micrsoft ASP.NET Web Frameworks and Tools
It was a simple case of going into extensions and updates under the Tools menu
I had this error and found it was due to the presence an 'Import' XML tag inside the .csproj.user file. Once I removed it, Visual Studio could open the project again.
What most people forget it is that the files of visual studio are just text files, that have some peculiars configurations that will show to the program how to open it. that is, we can change this because it's just a text in some file in there in your project folders.
Well, knowing this, what we have to do is very simple!
The first step is knowing what kind of project it is this project that stay unload. (for example: Class Library)
The Second step is create a new one (Class Library) because you know that your visual studio will create a version supported by himself. Unload this one and click in "Edit csproj".
It's in this file that we can found the configuration that tell to VS how this proj will be loaded and his name is ProjectGuid, this serial number has a variation according the type and version of project.
Now, look at your "ok project", copy the "ProjectGuid" TAG, paste on csproj that unloaded, and pay attention to the little differences and make this files almost equals, except for the tags ItemGroup that represent the references of the project.
Doing that, save all files and close your VS and open again, now your project should load normally.
I hope that this informations help somebody to understand a bit more how the VS works and help solve the problems when necessary.
I checked if i could create a new solution and was unable because SSAS,SSIS and SSRS weren't there as options.
I downloaded SSDT from here and installed and it worked...
https://learn.microsoft.com/en-us/sql/ssdt/download-sql-server-data-tools-ssdt?view=sql-server-2017
In case you came here looking for the issue with ".smproj" file, it is because you are missing SQL Server Analysis Services(SSAS). To over come this, install SQL Server Data Tools(SSDT) in your system, restart your Visual Studio and it will work.
Thanks.
This is my answer, I think it's useful. Please follow below steps:
1.First check your Visual studio version is 2012, 2015 or 2017 etc.
2.Your project is developed in 2015, but your visual studio 2012, then visual studio 2012 should not open the which are developed in visual studio 2015 projects.
3.If developed project visual studio 2012 and you have visual studio 2012, open the project but here need to check one option as per below
a) Target Framework - Open your project ".csproj" file with notepad++ and search with "TargetFrameworkVersion" and observe target framework value.
b) Open any existing project in your visual studio - Select project at 'Solution Explorer' - Right click - Properties - Application -Select Target Framework - Observe highest your framework which you have
c) 3.a and 3.b frameworks both are should same otherwise applications are not open
d)If your target framework less than the project framework should install the latest's
e) above options do not work just Simply have another option modify the "TargetFrameworkVersion" value in '.csproj' file which is have in your visual studio.
Ex: in my visual studio target framework 4.0 but in '.csproj' file have TargetFrameworkVersion - 4.5, You need just change 4.5 to 4.0 and open the project
This issue might be caused when using VS 2015 with Update 3 installed on one PC and without update 3 installed on another. This was the problem in my case.

Missing bin/EntityFramework.xml file in Visual Studio 2010 and EF 4.1 DB First

Main Goal - To deploy a live version of my solution on an IIS. I am currently attempting to do so by building a deployment package through Visual Studio 2010.
Issue - When attempting to build a deployment package or publish my project within Visual Studio 2010, I get an error stating that 'bin/EntityFramework.xml' is missing.
I've done quite a bit of research and have not been able to find any information on how this file could have gone missing or how to restore/regenerate the file.
Questions - Is there any way to restore or regenerate the 'bin/EntityFramework.xml' file? Or, is there a simpler approach for deploying my VS 2010 solution to an IIS?
(FYI, I've already attempted copying the file structure to an IIS manually. This caused assembly issues, which is why I'm currently avoiding that approach.)
Thanks!
To answer the specific question first, you can easily regenerate this file by creating a new project of the same type (e.g. ASP.NET MVC3), then building that new project. EntityFramework.xml will appear in the new project's bin folder. You may then copy it over to your existing project.
However, you can just 'Exclude from Project' the missing file (via right-click in Solution Explorer), since it is not required to build, then you will achieve your goal of publishing the project through VS2010.

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