NullReferenceException when using Razor "@" inside of CSS styles

Question

Issue:
Receiving "Object Reference Not set to an instance of an object" when I hit ctrl-v in CSS styles
Steps to Reproduce:
Open Visual Studio Ultimate 2013
Create new ASP.NET Web Application (Create directory for solution)
Choose MVC (Auth is Individual User Accounts)
Open Shared/_Layout.cshtml (I can reproduce the error by following the below steps in any .cshtml file)
DO NOT SAVE FILE CHANGES AT ANY POINT (though I've noticed this makes no difference)
Add <style> </style> just before </head>
Add #foo {color: red;} inside of <style>
CSS syntax highlighting still works at this point
Add razor syntax @ symbol to color: red;
#foo {@color: red}  
CSS syntax highlighting is lost
Add #bar {color: green;}
Highlight #bar {color: green;}
Hit ctrl-c to copy
hit ctrl-v to paste clipboard anywhere BUT inside of <style></style>
Pasting outside of <style> should still work.
Now hit ctrl-v and paste clipboard inside of <style></style>
shoudl receive Error message: Object reference not set to an instance of an object
Undo (ctrl-Z) should no longer work at this point
NOTES:
Copying from outside of visual studio and pasting inside the <style> tag in _Layout.cshtml should nto produce an error
Last thing, it does not matter if I am using the @ symbol in valid CSS (background: @url(...)) or invalid CSS (color: @red)
Trying to escape the @ symbol (background: @@url(...)) mnakes no difference.
Info:
Microsoft Visual Studio Ultimate 2013 version 12.0.21005.1 REL
.NET Framework version 4.5.51650
Windows 8.1 Enterprise v6.3.9600 Build 9600
Nuget Packages installed - only what is installed by default when creating new MVC ASP.NET Web Application

Answer 1

Hi jonathanthomas,
Since this issue is related to the web development,
you could ask this question in the ASP.NET forum:
http://forums.asp.net. If then, you could get
an answer more quickly and professional. Thanks for your cooperation.
Best Regards,
Jack
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