like any recently Microsoft products like WWF 4, WPF,Silverlight, Metro style, I suggest you, Implement Reporting in XAML, or porting RDF file and provide (native xaml base) controls, for using in WPF and silverlight application.

The behaviour of VS2010 right now is that if you remove a project from a solution and other projects reference it then VS will remove the project reference from all the projects including checking them out of source control WITHOUT any confirmation!
VS should warn the user that the project is being used and ask for confirmation.

Right now, if you have a solution with two projects A & B when A depend on B and you compile the solution then A will be compiled even if B failed compilation.
It would be nice to have an option to prevent this.

For example:
Test<T>(T mask, T flag) where T : enum

It's a bit irritating that the compiler can't seperate enums from other value types.

Double click output error,make line cursor well marked(colorful high light,in DARK Theme) on the left of editor.

In the RC (didn't try the beta),when you select a file in the Solution Explorer a preview pane opens with the content of the file. This feature is awesome but it doesn't work for parent files. Like if you have an App.xaml with a nested App.xaml.cs file file preview will only work for the nested App.xaml.cs file and not the parent App.xaml file. Please make it work for both.

currently, ngened dll's quality is about same or worse than JITed dll. please make ngened dll to have better quality by spending more time on optimizing final dll. it doesn't make sense that the ngened dll's instruction quality to be same as JITed one where things are optimized for speed of jitting but not for performance of actual app running.

ngen should be able to even produce better code than others who creates dlls before hand, but not on clients machine. but currently, it doesnt do that.

also, please remove the hard link limitation the ngened dll has on references.

This image describe how I have difficulties to read some highlighted words where I've a line with a diff

We typically don't use hours on our tasks. It would be nice to change the burndown in TFS to use story points on completed/non-completed PBIs instead.

When you format HTML document (CTR+K,D) in Visual Studio 11 Beta, it strips some whitespaces which should be kept (screwing the document formatting). For example:

<a href="#">123</a> | ..becomes.. <a href="#">123</a>|
<strong>123</strong> или ..becomes.. <strong>123</strong>или

etc.

Those bugs make HTML auto-formatting useless. Has to be fixed before the RTM.

Had to scroll up and down for couple of hours,In a big web project. And it's just needless effort for the eyes.

I understand that the OpacityMask was removed for UI performance reasons, but just because it may be over utilized by some doesnt mean it should be dropped all together.

You have nicely included the option to start debugging with different browsers. What really would complete an awesome debugging experience would be an option to define and select different resolutions and start debugging with a defined window size. Even the option to select multiple sizes and have several browser start with different resolutions would be nice.

Allow winrt value types to have properties, methods and constructors.

css editor not Intelligent!!!,yes css editor not Intelligent.
please see microsoft expression web 4 css editor,The proposed css pseudo class and complate it,and very very another features which visual With all this greatness!,It has been denied.Unfortunately the new version of visual 2012 once it has been denie!!!Sorry,Sorry,Sorry :(