Can't create app packages Universal Apps - c#

I wanted to load my universal windows app into the app store. So i create my app packages. The problem was now, that i got a few build errors that the namespace of my custom control cannot be found. This is interesting because I can start my app in debug and release mode on my computer and on my mobile.
I hope you know what my problem is and you can help me.

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Issue with launching Feedback Hub from UWP app

I followed these two docs (Doc1, Doc2) to integrate Feedback hub in my app. I used NuGet to install the Microsoft Store Services SDK.
As recommended I am using StoreServicesFeedbackLauncher.IsSupported() to check if the Feedback hub is available or not. This works locally on my machine, but in production all customers hit System.Exception with message "Method 'StoreServicesFeedbackLauncher.IsSupported()' was not included in compilation, but was referenced in HomePage.<feedback_tapped>d__23.MoveNext(). There may have been a missing assembly."
I have read the docs again and don't seem to have missed any of mentioned the steps.
Edit
This app is a Desktop Bridge app. The solution has a UWP app which communicates with a win32 exe. I am trying to launch the app from UWP app. The solution has a Windows Application Packaging project to package the app.

deploy simple c# app to another computer from Visual Studio 2017

I have written a simple c# app to let my son do some stats on dice rolling for a game he is developing.
I created a simple interface using Visual Studio 2017 and Universal Windows.
After loads of silly errors - and lots of less silly ones, I finally have an app that runs as I want it to in debug mode.
I now want to publish it so he can copy the files and run it on his Windows computer.
Now I am sure this is really easy - but after 2 days of google searching, MSDN searching and searching this forum I am no nearer knowing what I need to do.
I have changed the solution configuration to Release and the platform to x86. I have run Build and Deploy solution form the build menu and have loads of files in my bin/x86/release file partial list from windows explorer.
But none of the exe files seem to do anything (the app5.exe waits a while sometimes, but no sign of the app anywhere).
I am obviously missing some critical preparatory step, but I can't find out what it is.
Some of the MSDN notes talk about Publish (this is greyed out or not present, but Deploy appears).
Can anyone please point me to some idiot proof documentation to help me work out what I should be doing.
I am new to Visual Studio, new to C# and new to windows app development - so my app has been pulled together from web research and using common sense :)
I have assumed that what I am trying to do is pretty easy - but I am not yet convinced.
To sell your Universal Windows Platform (UWP) app or distribute it to other users, you need to package it. If you don't want to distribute your app through Microsoft Store, you can sideload the app package directly to a device. Since you used the VS, you can follow this document to package a UWP app with Visual Studio: https://learn.microsoft.com/en-us/windows/uwp/packaging/packaging-uwp-apps#sideload-your-app-package.
After you package your app, if you want to sideload your app, you can follow the How do I sideload an app on desktop part in the following document:
https://learn.microsoft.com/en-us/windows/application-management/sideload-apps-in-windows-10#how-do-i-sideload-an-app-on-desktop
More details, you can get from this topic:
https://learn.microsoft.com/en-us/windows/uwp/packaging/

UWP App Won't Start

I have a UWP app. I'm using Visual Studio 2017 15.4.1. The UWP app is a store app and has been deployed to the Microsoft Store. My app was working fine in the store, and it was also working fine when I hit play in Visual Studio. Then recently, an isolated storage issue started occurring so I went in to the app in "Apps & Features" and hit Advanced Options -> Reset. Somehow this has fried my app installation on my machine. Our app no longer shows up as an installed app, and when I try to install the app from the store, I get an error with a code of 0x80073CF9. So, I can't uninstall, or reinstall on my machine. I've tried running sfc /scannow etc. to find out what's wrong, but nothing seems to help.
This wouldn't even worry me too much, but I can't even develop right now because when I try to run the app from Visual Studio, I get this error:
In order to debug this project, you must consume it from a Windows
Store app project that creates a package and is marked as the Startup
Project
I'm getting this error in the output window from the build
4>DEP0700: Registration of the app failed. [0x80073CF9] Another user
has already installed an unpackaged version of this app. The current
user cannot replace this with a packaged version. The conflicting
package is [APP NAME] and it was published
by CN=[Publisher].
What did I do wrong?
You can use Get-appxpackage -allusers *<appname>* | Remove-AppxPackage
The allusers option is important here.
You can also try to manually remove the content of the application cache folder in C:\Users\\AppData\Local\Packages\. If you have one locked file here, the whole deployment will fail.

Get Windows 10 universal app installation package - for individual installation

Alright, I'm currently trying to figure out, how can I get my Windows 10 universal app to package, so I could send it to another person and he could use that program.
I managed to create some kind of package, but it still seems to be for Windows Store..
Couldn't find a good answer from Google as well, mostly still about how to get that app to store -.-'
What I mean is for example, if I do a Console app, then I can get that .exe file and execute that in any computer. Does Win 10 Universal App even support this kind of feature?
Currently getting this kind of error, if trying to execute that from bin folder:
You have to sideload your app package

How to Deploy Android Apps Using Xamarin Studio?

I have created a demo apps Hello Android From Xamarin Studio It's Not Deploy when i Run.
in demo tutorial it's running fine and then it's deploy means that it's install first time and then we can use but in my created demo it is not install. please any one resolve my problem. why it is not work?
Please look below link for more details About Error:
http://forums.xamarin.com/discussion/6994/after-the-emulator-starts-up-and-slide-the-lock-button-my-apps-not-installed-means-it-s-not-display?new=1
I had that problem too, it was resolved when i update my hard disc to ssd. Try to open the emulator first, and then run the demo app.

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