Windows 10: Issues with an old .NET application and Windows 11

Hi,an old application built with .NET Framework 4.8 has suddenly the last week stopped working correctly; being an open source application, I've downloaded the source code it is written in C# and with Visual Studio 2022 managed to recompile it and found the source of the problem.What happens is that the FolderBrowserDialog class now shows only the Desktop node and nothing else; if that is not strange enough, what is stranger is that the same application run inside the Windows sandbox shows instead all the other folders, as it used to do up to tow weeks ago.I've compiled also the FolderBr

:)

 

Getting a Microsoft .Net Framework Unhandled Exception on Application Windows 10

Hi Steven,

It is possible that the error Microsoft .Net Framework Unhandled Exception on Application is can be due to virus or malware. To better assist you, kindly answer the following questions:

• Have you made any recent changes before this issue occur?
• What troubleshooting steps have you done so far?

Meanwhile, we suggest that you follow the steps in this article:
Start your PC in safe mode in Windows 10 and you may also perform a clean boot to remove software conflicts by clicking on this

link.

Keep us posted if you need additional help.

 

error 0x800F081F while installing .net 3.5 issue Win 10 x64

Hello Steebo,

Thank you for posting your concern in Microsoft Community and we regret for the inconvenience. Let me assist you.

Please follow the below suggested methods and check if it helps to resolve the issue.

Sometimes, during an app installation, it needs a specific version of .NET Framework. In those cases, it might automatically install and activate that version. Is it the same in your case?

Also, are you trying to download and install .net framework because it is a pre-requisite for another application/program to run?

Now, 0x800F081F is one of the Windows update error codes users usually face. I suggest you to follow these steps to run the Windows inbuilt troubleshooter and check if it helps to identify any potential issue.

• Write Troubleshooting in the search box and hit enter.

• Click on Troubleshooting tab.
  

• Click on view all option on the upper left corner.
  

• Select the Windows Update option from the list.
  

• Click Next to run theTroubleshooter.

Write to us with the updated status and the required information for us to be able to assist you further.

Thank you.

 

microsoft net framework 4 unhandled exception has occurred in your application

Hi Simon,

Do let us know how exactly you have tried to perform repair of .Net Frame work on your computer.

Let us try the below troubleshooting steps and check if it helps.

Step 1: I suggest you to turn off, turn on the .Net framework and check if it helps.

• PressWindows + X keys from the keyboard, click on
  Programs and Features.
• Click on Turn Windows features on or off from the left pane.
• Uncheck the .Net framework feature, restart the computer.
• Follow the same as I & 2 check mark the feature, restart the computer and check with the status.

If the issue still persists,

Step 2: I suggest you to repair the framework using repair tool and check.

Refer: Microsoft .NET Framework Repair Tool is available


Hope it helps. Try the above and update us the status of this issue for further assistance.

Thank you.