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This occurs whether you are in the design or source/xml view.
Pressing Control Z (Undo) deletes the ENTIRE layout content. This occurs if you have no changes that can be "undone". In fact, if you open a file and immediately hit CTRL+Z, it will do this. This makes it somewhat difficult to create layouts.
I have checked this issue with VS, and I am also able to reproduce it.
Steps to reproduce :
1. Create Android sample project in VS
2. Open designer file .axml
3. Open source view of designer file
4. Press Ctrl + z
Actual Result : It deletes all content in source file of .axml file as shown in screencast : http://screencast.com/t/sGnMcmhif
Expected Result : It should not delete content of .axml file. Because there is nothing to undo.
Environment info :
Version 12.0.30324.00 Update 2 RC
Microsoft .NET Framework
Installed Version: Professional
LightSwitch for Visual Studio 2013 06177-004-0444002-02101
Microsoft LightSwitch for Visual Studio 2013
Microsoft Office Developer Tools - Update 1 for Visual Studio 2013 ENU 06177-004-0444002-02101
Microsoft Office Developer Tools - Update 1 for Visual Studio 2013 ENU
Team Explorer for Visual Studio 2013 06177-004-0444002-02101
Microsoft Team Explorer for Visual Studio 2013
Visual Basic 2013 06177-004-0444002-02101
Microsoft Visual Basic 2013
Visual C# 2013 06177-004-0444002-02101
Microsoft Visual C# 2013
Visual C++ 2013 06177-004-0444002-02101
Microsoft Visual C++ 2013
Visual F# 2013 06177-004-0444002-02101
Microsoft Visual F# 2013
Visual Studio 2013 Code Analysis Spell Checker 06177-004-0444002-02101
Microsoft® Visual Studio® 2013 Code Analysis Spell Checker
Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.
The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.
Windows Phone SDK 8.0 - ENU 06177-004-0444002-02101
Windows Phone SDK 8.0 - ENU
ASP.NET and Web Tools 2013.2.50314
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Page Inspector: Inspection tool for ASP.NET web projects
Scaffolding: A framework for building and running code generators
Server Explorer extensions for Windows Azure Web Sites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Windows Azure
ASP.NET Web Frameworks and Tools 2012.2 4.1.21001.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563
ASP.NET Web Frameworks and Tools 2013 5.1.20303.0
For additional information, visit http://www.asp.net/
Common Azure Tools 1.1
Provides common services for use by Azure Mobile Services and Windows Azure Tools.
NuGet Package Manager 2.8.50313.46
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
PreEmptive Analytics Visualizer 1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.
SQL Server Data Tools 12.0.30919.1
Microsoft SQL Server Data Tools
Windows Azure Mobile Services Tools 1.1
Windows Azure Mobile Services Tools
Windows Phone 8.1 SDK Integration 1.0
This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio.
Workflow Manager Tools 1.0 1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.
Xamarin for Visual Studio 126.96.36.199 (30e1fdc5420426a298695367b58fd2edc4dede34)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android
Xamarin.Android 188.8.131.52 (f3cd50c9abf5b6106e1252c97922b0a91025d7c9)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.iOS 184.108.40.206 (30e1fdc5420426a298695367b58fd2edc4dede34)
Visual Studio extension to enable development for Xamarin.iOS
Thanks for the report and confirmation!
It does not save the change and only happens when there are no changes to undo, so the loss should be immediately reverse-able. Still, since this issue has the capacity to delete user data unintentionally, increasing priority.
*** This bug has been marked as a duplicate of bug 11466 ***