Windows 10: .NET Framework May 2018 Preview of Quality Rollup

Brink · May 16, 2018

Today, we are releasing the May 2018 Preview of Quality Rollup.

Quality and Reliability

This release contains the following quality and reliability improvements.

CLR

Resolves an issue in WindowsIdentity.Impersonate where handles were not being explicitly cleaned up. [581052]

Resolves an issue in deserialization when using a collection, for example, ConcurrentDictionary by ignoring casing. [524135]

Removes case where floating-point overflow occurs in the thread pool’s hill climbing algorithm. [568704]

Resolves instances of high CPU usage with background garbage collection. This can be observed with the following two functions on the stack: clr!*gc_heap::bgc_thread_function, ntoskrnl!KiPageFault. Most of the CPU time is spent in the ntoskrnl!ExpWaitForSpinLockExclusiveAndAcquire function. This change updates background garbage collection to use the CLR implementation of write watch instead of the one in Windows. [574027]

Networking

Fixed a problem with connection limit when using HttpClient to send requests to loopback addresses. [539851]

WPF

A crash can occur during shutdown of an application that hosts WPF content in a separate AppDomain. (A notable example of this is an Office application hosting a VSTO add-in that uses WPF.) [543980]

Addresses an issue that caused XAML Browser Applications (XBAP’s) targeting .NET 3.5 to sometimes be loaded using .NET 4.x runtime incorrectly. [555344]

A WPF application can crash due to a NullReferenceException if a Binding (or MultiBinding) used in a DataTrigger (or MultiDataTrigger) belonging to a Style (or Template, or ThemeStyle) reports a new value, but whose host element gets GC’d in a very narrow window of time during the reporting process. [562000]

A WPF application can crash due to a spurious ElementNotAvailableException. [555225]
This can arise if:

Change TreeView.IsEnabled

Remove an item X from the collection

Re-insert the same item X back into the collection

Remove one of X’s subitems Y from its collection
(Step 4 can happen any time relative to steps 2 and 3, as long as it’s after step 1. Steps 2-4 must occur before the asynchronous call to UpdatePeer, posted by step 1; this will happen if steps 1-4 all occur in the same button-click handler.)

Note: Additional information on these improvements is not available. The VSTS bug number provided with each improvement is a unique ID that you can give Microsoft Customer Support, include in StackOverflow comments or use in web searches.

Getting the Update

The Preview of Quality Rollup is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog.
Click to expand...

Read more: .NET Framework May 2018 Preview of Quality Rollup | .NET Blog

:)

Waseemulla S · May 16, 2018

Microsoft .NET Framework, Unhandled exception

Hi,

Welcome to Microsoft Community.

I suggest you to un-check and recheck .Net framework 3.5 and .Net framework 4.6 advance series from Windows features.

Try the following steps:

Press Windows + R keys to open Run command.

Type Appwiz.cpl and select "turn Windows feature on or off" from the left

Uncheck .Net framework 3.5 and .Net framework 4.6 advance series.

Restart the computer

Repeat step 1 and 2 and check .Net framework 3.5 and .Net framework 4.6 advance series.

Restart the computer.

Regards,

Adam Fenton · May 16, 2018

reinstalling .net framework 4.6.1

hi,

I was trying to fix a computer problem and my .net framework was broken or something I don't know what exactly however I uninstalled all the .net frameworks I had in my programs list and tried to reinstall it said .net framework 4.6.1 or later is already
installed but when I look in programs list it is not there I did install SDK and got the 4.6.1 SDK and targeting pack but just cannot install the non SDK version.

does anyone know how to fix this. Also I am on windows 10 and before I unistalled framework I did see all the frameworks listed in my programs list so I cannot get the non sdk back only the sdk version

thanks.

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