Known issues in the .NET Framework 4.7

Applies to: Microsoft .NET Framework 4.7

This article lists the known issues that you may experience after you install the Microsoft .NET Framework 4.7.

Product issues for the .NET Framework 4.7


For known issues and available workarounds, see the following articles. 
 
Description
The form is not scaled to the new level when you run a DPI-aware application on a different scaling level in .NET Framework 4.7
Error CS8179 when you debug an application on a computer that has .NET Framework 4.7 installed
NullReferenceException thrown from PresentationFramework.dll during SpellCheck operations after SpellCheck.CustomDictionaries.Clear() is called programmatically
The edit field of Date Time Picker can't display date correctly in a .NET Framework 4.7-based application
The .NET Framework 4.7 installation blocks on Windows 7, Windows Server 2008 R2, or Windows Server 2012 due to missing d3dcompiler update
WPF window can't be loaded after you install the .NET Framework 4.7 on Windows Server 2016 (Server Core)
"COMException" error from WPF applications after the .NET Framework 4.7 is installed on Windows 7 or Windows Server 2008
Exception error occurs on opening Sitefinity based web applications after installing .NET Framework 4.7
Expiration time issue when you insert items by using the "Cache.Insert" method in the .NET Framework 4.7
ASP.NET/IIS applications may fail to load when web.config file of the application is overridden by using Configuration.Save(…) or Configuration.SaveAs(…) methods in the .NET Framework 4.7
AppContext switch overrides are not applied to applications that run on the .NET Framework 4.7
"Value does not fall within the expected range" when changing DFS replication group or namespace
Applications that rely on TLS 1.2 strong encryption experience connectivity failures after a Windows upgrade

Note If you encounter an issue about installation or uninstallation of the .NET Framework 4.7, see Troubleshoot blocked .NET Framework installations and uninstallations.