Cumulative Update KB4519572 .NET Framework 4.8 Windows 10 v1803 Oct.15 Win Update

    Cumulative Update KB4519572 .NET Framework 4.8 Windows 10 v1803 Oct.15

    Cumulative Update KB4519572 .NET Framework 4.8 Windows 10 v1803 Oct.15

    Category: Win Update
    Posted: 15 Oct 2019

    October 15, 2019 - KB4519572 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1803

    Applies to: .NET Framework
    Version: .NET Framework 4.8

    The October 15, 2019 update for Windows 10 Version 1803 includes cumulative reliability improvements in .NET 4.8. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.

    Quality and reliability improvements

    ASP.NET Addresses an issue with ValidationContext.MemberName when using custom DataAnnotation.ValidationAttribute.
    WPF1 Addresses and issue where software rendering fails to draw images whose position and scaling are too large. For example, an Image element with Width=10, sourced to a bitmap with width=500 and positioned 700 pixels from the left edge of the enclosing window, fails to appear because the scaling factor S = 500/10 = 50 and the position X=700 are too large, in the sense that their product S * X = 50 * 700 = 35000 exceeds 2^15 = 32768.
    CLR2 Reduces the risk of returning unordered ConstructorInfo's from Type.GetConstructors().
    Improved behavior in scenarios where external bugs (such as a double-free) prevent underlying OS threads from starting. The runtime now fails with a diagnostic error rather than hanging waiting for the thread to start. This allows better failure recovery and better diagnostics of the problem that caused the failure.
    Addresses and issue with late bound .NET COM calls containing SafeArrays where the SafeArray is not fully initialized.
    Winforms Addresses an issue that prevented navigation to the last item of the dropped-down menu item by single up-arrow key press.
    Addresses and issue where the property grid can throw a NullReferenceException when selection changes to null (nothing is selected) in response to value changes

    1 Windows Presentation Foundation (WPF)
    2 Common Language Runtime (CLR)

    How to obtain and install the update

    Install this update

    To download and install this update, go to Settings > Update & Security > Windows Update, and then select Check for updates.

    To get the standalone package for this update, go to the Microsoft Update Catalog website.

    File information

    For a list of the files that are provided in this update, download the file information for cumulative update .


    To apply this update, you must have .NET Framework 4.8 installed.

    Restart requirement

    You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

    Update replacement information

    This update replaces previously released updates 4515842.


    Direct download links for KB4519572 MSU file from Microsoft Update Catalog:

    Download KB4519572 MSU for Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 v1803 32-bit (x86) - 27.2 MB

    Download KB4519572 MSU for Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 v1803 64-bit (x64) - 49.0 MB
    Brink's Avatar Posted By: Brink
    15 Oct 2019


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