Clicking on that option often takes 5-10 seconds and it completely hangs the GUI.

It's a big annoyance to not have auto completion there. C# Interactive from Roslyn supports it, and even the Immediate pane of C# and VB also have it

Since Visual Studio 2010 was originally built to support newer versions/future version of the .Net Framework, .Net 4.5 support should be added to Visual Studio 2010 since Visual Studio 2012 has significantly reduced the usability and productivity of the IDE by discoloring the UI as well as removing critical features such as "Creating Unit Test". Adding .Net 4.5 support to Visual Studio 2010 would allow developers who do not wish to upgrade to Visual Studio 2012 the ability to continue using their favorite IDE with the latest .Net technology.

Allow to customize the XML tags recommended for use in XML inline comments for documentation.

Just as in VB, a CSharpXMLDoc.xml could be saved in AppData to pass C# editor the customized XML elements.

R# is a super popular addin and dramatically slows down VS startup. This situation certainly impacts negatively the VS startup issue many are complaining about.

Through he VSIP program R# guys and VS guys should meet and see how the R# bulk code (>40MB of dlls) load could be smartly deferred when the user is choosing a sln / loading a sln / starting work with a sln.

It would be great to have a RowTest attribute (like in NUnit) added to facilitate parameterized tests, like:

[RowTest]
[Row(10, 10, 100)]
Public void Add_MultipleValues_ReturnsSum(int x, int y, int expected) { … }

Today it is a lot of manually coding to build a application with a many-to-many relation.
It would be nice to have more out of the box support for this.

Version Control

Bring over the code navigation features found in the VB.NET/C# Visual Studio experience, such as Find All References and Call Hierarchy

This would show which files are currently checked out and how long they have been checked out. Would improve transparency within teams to see how long developers are going without checking in code.

Sometimes when I want to list all the methods of a function. I have to use 2 keyboard shortcuts to do this.
Option "Always show Intellisense" would make suggestions show ALL the time. If I click somewhere out the editing box, they will disappear, when I click back, they show again.

Third-party builders of workflow activities (like for TFS Build) would like to be able to add their workflow activities to the Workflow Designer Toolbox by either having end users install our activity package using a VSIX deployment (using the Visual Studio Gallery) or by an MSI Installer.

This process would be similar to the way other third-party component vendors are able to add to the toolbox for WinForms, ASP.NET, Silverilght, WPF, etc. controls. We would like the same functionality for Workflow Activities.

Original Forum Post with more details: http://social.msdn.microsoft.com/Forums/en-US/vsx/thread/410242a8-42ac-42b6-8fcf-08088bd5b31a

possibility to compile C# (for example) code to native .exe included framework library inside assembly (here more correctly - .exe)

It would be very useful if TFS has the ability to merge multiple, non-continuous changesets in a single operation.
This would eliminate the need to create too many branches for each development project.

I should be able to find out all the test plans/ test suites in which a given test case is used

Allowing federated authentication for TFS in Azure (tfspreview.com) so that we can manage our users internally