Symptoms
Assume that you use Visual Studio 2015 in Windows 10 version 1709. When you try to save a file in the editor that belongs to an Apache Cordova, ASP.NET Core Web Application (.NET Core), or Universal Windows Platform (UWP) project with JavaScript, the file either disappears from the project or changes to show a missing file icon.
Cause
Windows 10 version 1709 includes a fix for some file system events. Visual Studio 2015 mistakenly interprets these events as deleting the file.
Download Information
The following file is available for download from the Microsoft Download Center:Download the update package now.
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
Workaround
To work around this issue, reload the project. After reloading, the project will include the missing file again.
More Information
Prerequisites
To apply this hotfix, you must have Visual Studio 2015 Update 3 installed.
Restart information
You may have to restart the computer after you apply this hotfix.
Replacement information
This hotfix does not replace any previously released hotfix.
File Information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
File name |
File version |
File size |
Date |
Time |
Platform |
VS14-KB4089821.exe |
14.0.27514.0 |
3,506,832 |
15-Mar-2018 |
9:23 |
X86 |
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section
References
Learn about the terminology that Microsoft uses to describe software updates.