Can't Debug on Device in Universal Windows App

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If you are unable to debug a Universal Windows App on a device, there could be several reasons for this issue. Here are some common troubleshooting steps you can follow:

  1. Ensure Developer Mode is enabled on your Windows 10 device:

    • Go to "Settings" > "Update & Security" > "For developers."
    • Select "Developer mode."

  2. Install the Developer License:

    • Open Visual Studio.
    • Go to "Tools" > "Options" > "Universal Windows App Development."
    • Select "Developer license" and click "Apply."

  3. Make sure the device is connected and recognized by your PC:

    • Check if your device is connected to the PC via a USB cable.
    • Ensure that the device shows up in the Windows Device Manager without any issues (no exclamation marks or error messages).

  4. Ensure the App is set to "Debug" configuration:

    • In Visual Studio, check that the active solution configuration is set to "Debug" and the target platform is "ARM" (for ARM-based devices) or "x64" (for x64-based devices).

  5. Check Firewall and Antivirus:

    • Sometimes, firewalls or antivirus software can interfere with debugging connections. Temporarily disable them to check if they are causing the issue.

  6. Restart Visual Studio and the Device:

    • Close Visual Studio and restart it.
    • Disconnect the device, restart it, and then reconnect it to the PC.

  7. Verify App Package:

    • In Visual Studio, right-click on your project in the Solution Explorer and select "Store" > "Create App Packages."
    • Follow the wizard to create the app package and make sure it is generated without any errors.

  8. Check Debugging Options:

    • In the "Debug" menu of Visual Studio, go to "Options" > "Debugging" > "General."
    • Make sure "Enable UI Debugging Tools for XAML" and "Enable XAML Hot Reload" options are enabled.

  9. Reset App's Cache and Data:

    • On the device, go to "Settings" > "Apps."
    • Find and select your app, then click "Advanced options."
    • Click "Reset" to clear the app's cache and data.

If none of the above steps work, try creating a new Universal Windows App project from scratch and see if you can debug it on the device. If that works, it might indicate an issue with the original project or configuration.

If you are still unable to debug on the device, you may want to check the Visual Studio diagnostic tools and event logs for any specific error messages or warnings that could provide additional information about the issue.