Applies to:

Microsoft .NET Framework 3.5

This update for Windows 8.1 and Server 2012 R2 includes cumulative reliability improvements in .NET Framework 3.5. 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.

Important

  • All updates for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 require that update KB 2919355 is installed. We recommend that you install update KB 2919355 on your Windows 8.1-based, Windows RT 8.1-based, or Windows Server 2012 R2-based computer so that you receive updates in the future.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Quality and reliability improvements

CLR1

  • Addressed an issue where the Framework would throw an exception is the year in the parsed date is greater or equal the year start the next era. Now, the framework will not throw such exception.

  • Updated Japanese Era dates that are formatted for the first year in an era and for which the format pattern uses “y年”. The format of the year together with the symbol “元” is supported instead of using year number 1. Also, formatting day numbers that include “元” is supported.

  • Removed dependency of single quote to output the Gannen character in Japanese Era formatting.

  • Addressed registry key setting HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\Calendars\Japanese\Eras to support Japanese Era.

1 Common Language Runtime (CLR)

Additional information about this update

For more information about this update as it relates to Windows 8.1 and Windows Server 2012 R2, see the following article in the Microsoft Knowledge Base:

4489488 March 2019 Update for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 8.1 and Server 2012 R2 (KB 4489488)

Known Issues

Microsoft is not currently aware of any issues with this update.

How to obtain and install the update

Microsoft Update Catalog

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

Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then select Action.

  3. Select Import Updates.

  4. WSUS opens a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4489488 in the Search box, and then select Search

  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.

  7. After you select all the packages that you require, select View Basket.

  8. To import the packages to your WSUS server, select Import.

  9. After the packages are imported, select Close to return to WSUS.

The updates are now available for installation through WSUS.

Prerequisites

To apply this update, you must have .NET Framework 3.5 enabled.

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 does not replace a previously released update.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 8.1 and Windows Server 2012 R2

Note: The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.


Additional file information

x64 Windows 8.1 and Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Big5.nlp

Not applicable

66,728

07-Nov-2017

17:43

Not applicable

Bopomofo.nlp

Not applicable

82,172

07-Nov-2017

17:43

Not applicable

Ksc.nlp

Not applicable

116,756

07-Nov-2017

17:43

Not applicable

Mscorlib.dll

2.0.50727.8805

4,575,232

06-Feb-2019

14:16

x64

Normidna.nlp

Not applicable

59,342

07-Nov-2017

17:43

Not applicable

Normnfc.nlp

Not applicable

45,794

07-Nov-2017

17:43

Not applicable

Normnfd.nlp

Not applicable

39,284

07-Nov-2017

17:43

Not applicable

Normnfkc.nlp

Not applicable

66,384

07-Nov-2017

17:43

Not applicable

Normnfkd.nlp

Not applicable

60,294

07-Nov-2017

17:43

Not applicable

Prc.nlp

Not applicable

83,748

07-Nov-2017

17:43

Not applicable

Prcp.nlp

Not applicable

83,748

07-Nov-2017

17:43

Not applicable

Sortkey.nlp

Not applicable

262,148

07-Nov-2017

17:43

Not applicable

Sorttbls.nlp

Not applicable

20,320

07-Nov-2017

17:43

Not applicable

Xjis.nlp

Not applicable

28,288

07-Nov-2017

17:43

Not applicable

Mscordacwks.dll

2.0.50727.8805

1,757,336

06-Feb-2019

14:16

x64

Mscorwks.dll

2.0.50727.8805

10,007,192

06-Feb-2019

14:16

x64

Sos.dll

2.0.50727.8805

486,040

06-Feb-2019

14:16

x64

Big5.nlp

Not applicable

66,728

27-Oct-2017

23:27

Not applicable

Bopomofo.nlp

Not applicable

82,172

27-Oct-2017

23:27

Not applicable

Ksc.nlp

Not applicable

116,756

27-Oct-2017

23:27

Not applicable

Mscorlib.dll

2.0.50727.8805

4,558,848

06-Feb-2019

14:13

x86

Normidna.nlp

Not applicable

59,342

27-Oct-2017

23:27

Not applicable

Normnfc.nlp

Not applicable

45,794

27-Oct-2017

23:27

Not applicable

Normnfd.nlp

Not applicable

39,284

27-Oct-2017

23:27

Not applicable

Normnfkc.nlp

Not applicable

66,384

27-Oct-2017

23:27

Not applicable

Normnfkd.nlp

Not applicable

60,294

27-Oct-2017

23:27

Not applicable

Prc.nlp

Not applicable

83,748

27-Oct-2017

23:27

Not applicable

Prcp.nlp

Not applicable

83,748

27-Oct-2017

23:27

Not applicable

Sortkey.nlp

Not applicable

262,148

27-Oct-2017

23:27

Not applicable

Sorttbls.nlp

Not applicable

20,320

27-Oct-2017

23:27

Not applicable

Xjis.nlp

Not applicable

28,288

27-Oct-2017

23:27

Not applicable

Mscordacwks.dll

2.0.50727.8805

990,360

06-Feb-2019

14:13

x86

Mscorwks.dll

2.0.50727.8805

5,947,032

06-Feb-2019

14:13

x86

Sos.dll

2.0.50727.8805

389,784

06-Feb-2019

14:13

x86

x86 Windows 8.1

File name

File version

File size

Date

Time

Platform

Big5.nlp

Not applicable

66,728

27-Oct-2017

23:27

Not applicable

Bopomofo.nlp

Not applicable

82,172

27-Oct-2017

23:27

Not applicable

Ksc.nlp

Not applicable

116,756

27-Oct-2017

23:27

Not applicable

Mscorlib.dll

2.0.50727.8805

4,558,848

06-Feb-2019

14:13

x86

Normidna.nlp

Not applicable

59,342

27-Oct-2017

23:27

Not applicable

Normnfc.nlp

Not applicable

45,794

27-Oct-2017

23:27

Not applicable

Normnfd.nlp

Not applicable

39,284

27-Oct-2017

23:27

Not applicable

Normnfkc.nlp

Not applicable

66,384

27-Oct-2017

23:27

Not applicable

Normnfkd.nlp

Not applicable

60,294

27-Oct-2017

23:27

Not applicable

Prc.nlp

Not applicable

83,748

27-Oct-2017

23:27

Not applicable

Prcp.nlp

Not applicable

83,748

27-Oct-2017

23:27

Not applicable

Sortkey.nlp

Not applicable

262,148

27-Oct-2017

23:27

Not applicable

Sorttbls.nlp

Not applicable

20,320

27-Oct-2017

23:27

Not applicable

Xjis.nlp

Not applicable

28,288

27-Oct-2017

23:27

Not applicable

Mscordacwks.dll

2.0.50727.8805

990,360

06-Feb-2019

14:13

x86

Mscorwks.dll

2.0.50727.8805

5,947,032

06-Feb-2019

14:13

x86

Sos.dll

2.0.50727.8805

389,784

06-Feb-2019

14:13

x86

x64 Windows 8.1 and Windows Server 2012 R2

File property

Value

Amd64_06d28d794e40a392093769c9d91f6e54_b03f5f7f11d50a3a_6.3.9600.21116_none_1c5129a35ea72a00.manifest

Not applicable

627

07-Feb-2019

14:39

Not applicable

Amd64_4ecad7f0b236a45cd0495b4d37b8a919_b03f5f7f11d50a3a_6.3.9600.21116_none_22e43067ed0ad02e.manifest

Not applicable

630

07-Feb-2019

14:39

Not applicable

Amd64_4f24f4863b21a629c117b112e87a2bad_b03f5f7f11d50a3a_6.3.9600.21116_none_bdf4d1a6ce8b4848.manifest

Not applicable

628

07-Feb-2019

14:39

Not applicable

Amd64_5e6641bf1be0a947a40399eb82c00231_b03f5f7f11d50a3a_6.3.9600.21116_none_8cbf1a2518c8d298.manifest

Not applicable

625

07-Feb-2019

14:39

Not applicable

Amd64_69b3d0424b6d444c3eb5c0e919114f5d_b03f5f7f11d50a3a_6.3.9600.21116_none_9cafe836240b476e.manifest

Not applicable

623

07-Feb-2019

14:39

Not applicable

Amd64_a16720484c120b16b0004bcbdb8a48e2_b77a5c561934e089_6.3.9600.21116_none_d70accf051000fd7.manifest

Not applicable

627

07-Feb-2019

14:39

Not applicable

Amd64_ba83ef9374084edf66c9cabfed9118c7_b03f5f7f11d50a3a_6.3.9600.21116_none_5ff8e30c1318e497.manifest

Not applicable

629

07-Feb-2019

14:39

Not applicable

Amd64_c8b21b60c3c3197f62ebdb3a2b1f0c32_b77a5c561934e089_6.3.9600.21116_none_46d4066d89dccd7b.manifest

Not applicable

618

07-Feb-2019

14:39

Not applicable

Amd64_ef543bf748b4d9e78958cbfa28997e09_b77a5c561934e089_6.3.9600.21116_none_7316d608086dc766.manifest

Not applicable

620

07-Feb-2019

14:39

Not applicable

Amd64_mscorlib_b77a5c561934e089_6.3.9600.21116_none_8441b3328a988eb2.manifest

Not applicable

185,285

06-Feb-2019

16:22

Not applicable

Amd64_netfx-mscordacwks_b03f5f7f11d50a3a_6.3.9600.21116_none_e7aca506d020ff0a.manifest

Not applicable

2,777

06-Feb-2019

16:22

Not applicable

Amd64_netfx-mscorwks_dll_b03f5f7f11d50a3a_6.3.9600.21116_none_eee8821ff81ff337.manifest

Not applicable

6,991

06-Feb-2019

16:22

Not applicable

Amd64_netfx-sos_dll_b03f5f7f11d50a3a_6.3.9600.21116_none_d07aecc7c415db1f.manifest

Not applicable

2,049

06-Feb-2019

16:22

Not applicable

Msil_mscorlib.resources_b77a5c561934e089_6.3.9600.21116_en-us_966124fe96e11a20.manifest

Not applicable

472

06-Feb-2019

15:19

Not applicable

Update.mum

Not applicable

2,731

07-Feb-2019

14:39

Not applicable

X86_mscorlib_b77a5c561934e089_6.3.9600.21116_none_cbeeea099f14b7b8.manifest

Not applicable

168,744

06-Feb-2019

15:29

Not applicable

X86_netfx-mscordacwks_b03f5f7f11d50a3a_6.3.9600.21116_none_2f59dbdde49d2810.manifest

Not applicable

2,769

06-Feb-2019

15:29

Not applicable

X86_netfx-mscorwks_dll_b03f5f7f11d50a3a_6.3.9600.21116_none_3695b8f70c9c1c3d.manifest

Not applicable

6,987

06-Feb-2019

15:29

Not applicable

X86_netfx-sos_dll_b03f5f7f11d50a3a_6.3.9600.21116_none_1828239ed8920425.manifest

Not applicable

2,045

06-Feb-2019

15:29

Not applicable

x86 Windows 8.1

File property

Value

Msil_mscorlib.resources_b77a5c561934e089_6.3.9600.21116_en-us_966124fe96e11a20.manifest

Not applicable

472

06-Feb-2019

15:26

Not applicable

Update.mum

Not applicable

1,872

07-Feb-2019

14:40

Not applicable

X86_06d28d794e40a392093769c9d91f6e54_b03f5f7f11d50a3a_6.3.9600.21116_none_c0328e1fa649b8ca.manifest

Not applicable

625

07-Feb-2019

14:40

Not applicable

X86_4f24f4863b21a629c117b112e87a2bad_b03f5f7f11d50a3a_6.3.9600.21116_none_61d63623162dd712.manifest

Not applicable

626

07-Feb-2019

14:40

Not applicable

X86_69b3d0424b6d444c3eb5c0e919114f5d_b03f5f7f11d50a3a_6.3.9600.21116_none_40914cb26badd638.manifest

Not applicable

621

07-Feb-2019

14:40

Not applicable

X86_a16720484c120b16b0004bcbdb8a48e2_b77a5c561934e089_6.3.9600.21116_none_7aec316c98a29ea1.manifest

Not applicable

625

07-Feb-2019

14:40

Not applicable

X86_c8b21b60c3c3197f62ebdb3a2b1f0c32_b77a5c561934e089_6.3.9600.21116_none_eab56ae9d17f5c45.manifest

Not applicable

616

07-Feb-2019

14:40

Not applicable

X86_mscorlib_b77a5c561934e089_6.3.9600.21116_none_cbeeea099f14b7b8.manifest

Not applicable

168,744

06-Feb-2019

15:29

Not applicable

X86_netfx-mscordacwks_b03f5f7f11d50a3a_6.3.9600.21116_none_2f59dbdde49d2810.manifest

Not applicable

2,769

06-Feb-2019

15:29

Not applicable

X86_netfx-mscorwks_dll_b03f5f7f11d50a3a_6.3.9600.21116_none_3695b8f70c9c1c3d.manifest

Not applicable

6,987

06-Feb-2019

15:29

Not applicable

X86_netfx-sos_dll_b03f5f7f11d50a3a_6.3.9600.21116_none_1828239ed8920425.manifest

Not applicable

2,045

06-Feb-2019

15:29

Not applicable

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