3,085 questions with Developer technologies | Universal Windows Platform (UWP) tags

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1 answer One of the answers was accepted by the question author.

How to write and read multiple types of data using Data Writer and Data Reader

I need to write a file length, file data and its type as a string value to the stream. I’m using the following code with Data Writer. writer = new DataWriter(socket.OutputStream); // if we have a StorageFile named file using (var…

Developer technologies | Universal Windows Platform (UWP)
asked 2019-10-30T06:58:34.097+00:00
fangfang wu 91 Reputation points Microsoft Employee Moderator
commented 2026-05-31T05:06:49.8566667+00:00
Aryan Kumar Mishra Mishra 0 Reputation points
2 answers

UWP app throws unhandled exception when installed from .msix package

This is a UWP app with Visual Studio Insiders [11709.129]. When deployed from Visual Studio, started with or without debugging to a Windows 10, an Xbox, or a Windows 11, it runs fine and is passing the tests. However, when the project is published to an…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-05-20T20:14:21.3+00:00
WoodManEXP 40 Reputation points
answered 2026-05-30T13:57:18+00:00
PeptixCalc 0 Reputation points
1 answer

Dev Mode Activation Fails — Redirects to Partner Center, No Workspace Access

I signed the NDA and installed the Dev Mode Activation app on my Xbox. When I try to activate Dev Mode, I get “We can’t authorize your console.” The activation link https://aka.ms/activatexbox redirects to Partner Center or shows a 404. I can’t create a…

Developer technologies | Universal Windows Platform (UWP)
asked 2025-10-13T08:00:13.7666667+00:00
Renee Hetrick 15 Reputation points
commented 2026-05-30T13:50:57.19+00:00
Ahmad ranya 0 Reputation points
0 answers

Coordinated Process Engine Substrate : CoPES

I've made my entire file system into a user space library for my custom application kernel. How do I slow down my system so that graphics will work at its slowest its still to fast for my TV to use fps, and For an architecture where 'file' and 'runtime…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-05-30T00:51:21.1+00:00
JW leftwich 0 Reputation points
commented 2026-05-30T00:53:23.26+00:00
JW leftwich 0 Reputation points
2 answers

Optional Packages Persist After Windows Store App Reset

After resetting a Windows Store app through App Settings, optional packages installed as dependencies continue to persist in the system. These "ghost packages" remain functional and accessible via PackageManager APIs but are not visible in App…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-05-18T17:41:53.77+00:00
Diogo Costa Maranhao Rodrigues 120 Reputation points
commented 2026-05-25T08:47:55.5233333+00:00
Jay Pham (WICLOUD CORPORATION) 3,690 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

How to enable Control Flow Guard (CFG) in C# UWP Application

How to enable Control Flow Guard (CFG) in C# UWP Application? I have tried to enable <ControlFlowGuard>Guard</ControlFlowGuard> <UseDotNetNativeToolChain>true</UseDotNetNativeToolChain> in Release | x64 . But it is still not…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-03-10T10:36:31.3066667+00:00
Raja Shanmugam 40 Reputation points
accepted 2026-05-14T04:38:37.9633333+00:00
Raja Shanmugam 40 Reputation points
1 answer

Why i only have 1.3gb to use in Xbox Dev Mode

I understand you can use approximately 5GB of RAM in Xbox Dev Mode, but it only lets me use 1.3GB. screenshot.

Developer technologies | Universal Windows Platform (UWP)
asked 2026-05-02T23:41:55.3033333+00:00
Elias Benjamin Lopez Perez 0 Reputation points
commented 2026-05-13T02:58:33.92+00:00
Danny Nguyen (WICLOUD CORPORATION) 6,945 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

UWP app System.IO.FileLoadException: 'Could not find or load a specific file. (Exception from HRESULT: 0x80131621)'

When I run a UWP app in debugging mode, it always throws this exception at the start: System.IO.FileLoadException HResult=0x80131621 Message=Could not find or load a specific file. (Exception from HRESULT: 0x80131621) Source=System.Private.CoreLib …

Developer technologies | Universal Windows Platform (UWP)
asked 2026-05-06T13:02:06.09+00:00
Hong 1,526 Reputation points
edited a comment 2026-05-08T03:54:03.43+00:00
Jay Pham (WICLOUD CORPORATION) 3,690 Reputation points Microsoft External Staff Moderator
3 answers One of the answers was accepted by the question author.

provider.SignInAsync() error from CommunityToolkit.Authentication.Uwp

The following code of a classic UWP app used for OneDrive access worked for a few years without any issues: string[] scopes = new string[] { "Files.ReadWrite.AppFolder" }; ProviderManager.Instance.GlobalProvider = new…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-05-04T23:05:02.2933333+00:00
Hong 1,526 Reputation points
commented 2026-05-06T10:53:48.14+00:00
Hong 1,526 Reputation points
2 answers

disabled subscription

"Your account or subscription is disabled for security reasons. We detected suspicious activity or terms of use violations and disabled your subscription to protect the owner of the payment instrument and Microsoft. If you believe this is an error,…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-04-25T12:47:16.45+00:00
musonda kaputo 0 Reputation points
commented 2026-04-30T03:54:45.4133333+00:00
Michael Le (WICLOUD CORPORATION) 11,325 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Windows.Data.Pdf does not render correctly with

The PDF file attached contains text using the following fonts: It is renderer correctly in various applications (firefox, edge, adobe acrobat): however when I render it in my app using Windows.Data.Pdf library, the text isn't correctly displayed: Is…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-04-24T14:09:08.2166667+00:00
Jérôme S 25 Reputation points
accepted 2026-04-25T15:22:58.0733333+00:00
Jérôme S 25 Reputation points
2 answers One of the answers was accepted by the question author.

Error APPX1204 Creating App Package for upload to MS Store

This is happening with Visual Studio Insiders [11709.129] with a UWP XBox targeted app. The app has been successfully side-loaded and tested on Dev-mode XBox. Creating the App Package produces this error: Failed to sign <filename.msix>. SignTool…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-04-23T12:47:35.76+00:00
WoodManEXP 40 Reputation points
accepted 2026-04-24T20:40:56.1+00:00
WoodManEXP 40 Reputation points
2 answers

I want to publish paid apps but the submit for certification is not showing.

I want to publish paid apps but the submit for certification is not showing.

Developer technologies | Universal Windows Platform (UWP)
asked 2026-04-01T07:57:30.4633333+00:00
Salman Farshi 0 Reputation points
commented 2026-04-06T09:57:03.0766667+00:00
Jack Dang (WICLOUD CORPORATION) 18,640 Reputation points Microsoft External Staff Moderator
4 answers One of the answers was accepted by the question author.

UWP how to change foreground color when mouse over?

Below is my code in App.xaml. I could change the DataGridRow background color while mouse over, but I couldn't change the foreground color while mouse over. What I could add in the PointerOver part? <Style x:Key="BasicDataGridRowStyle"…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-03-05T07:53:20.88+00:00
kw Lee 25 Reputation points
edited a comment 2026-04-02T15:10:40.6666667+00:00
kw Lee 25 Reputation points
1 answer

Does this xbox-live-api(1807_xdk) still work?

I used this sdk(1807_xdk) in my UWP Games for xbox live sign-in, which I download from nuget(Microsoft.Xbox.Services.141.UWP.Ship.Cpp.lib), but it stopped working recently, the error code is 0x87DD0005. Not only me, but all users cannot sign in now. I…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-03-20T15:07:58.6733333+00:00
BIN 0 Reputation points
edited a comment 2026-03-30T04:42:07.06+00:00
Jay Pham (WICLOUD CORPORATION) 3,690 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

[C#]Scale a frameworkelement using a storyboard in UWP does not work

I have created a UWP app that I want to implement the following requirements: 1）First I need to move several animated images from various canvas locations to a specific location 2）Then at the same time scale those images from its current size to…

Developer technologies | Universal Windows Platform (UWP)
asked 2019-10-30T07:13:56.47+00:00
Anonymous
commented 2026-03-24T20:12:04.94+00:00
ANTHON AVILES 0 Reputation points
1 answer

Console stuck activating Dev Mode for individual account 0x8015963D

I cannot activate developer mode infinite loading on aka.ms/activatexbox when trying to activate 0x8015963D in hidden menu that works for some people. Tried: Power cycles (10+ min unplug) Reinstall Xbox Dev Mode app (green one) Hidden menu…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-03-08T03:58:15.37+00:00
Daniel McGuire 0 Reputation points
commented 2026-03-12T10:36:44.8933333+00:00
Jay Pham (WICLOUD CORPORATION) 3,690 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Localization issues when using App Bundle in UWP

I’m having issues with Localization in my UWP applications. I can reproduce this issue using Microsoft Localization sample. The following is what I have done to reproduce this issue: Step1: I open the project in Visual Studio. I test it…

Developer technologies | Universal Windows Platform (UWP)
asked 2019-10-30T06:16:16.72+00:00
fangfang wu 91 Reputation points Microsoft Employee Moderator
answered 2026-03-05T18:33:39.73+00:00
Zia 0 Reputation points
3 answers

generating a device‑related identifier

I’m working on a UWP application where we need to associate a device with app‑specific logic (for example, licensing tied to a device). We previously used an API that generated a device‑related identifier, but its stability has changed on some Windows…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-02-05T09:46:32.09+00:00
Anjali Narvekar 0 Reputation points
commented 2026-02-23T09:12:24.61+00:00
Jay Pham (WICLOUD CORPORATION) 3,690 Reputation points Microsoft External Staff Moderator
1 answer

Unique ID of machine

Hi, Can anyone suggest which of the following methods to retrieve uniqueid from machine and more stable and reliable? 1.SMBIOS System UUID Source: SMBIOS Type 1 table, retrieved via GetSystemFirmwareTable('RSMB'). 2.TPM Endorsement Key Public Key…

Developer technologies | Universal Windows Platform (UWP)
asked 2026-02-05T09:18:15.0933333+00:00
Anjali Narvekar 0 Reputation points
commented 2026-02-18T10:43:52.0366667+00:00
Danny Nguyen (WICLOUD CORPORATION) 6,945 Reputation points Microsoft External Staff Moderator