There have been seven significant releases of the .NET Framework, excluding service packs. The framework includes the compilers, runtime, and libraries. Additionally, there are other profiles such Silverlight which complicate matters.
1.0 – released in 2002
1.1 – released in 2003
2.0 – released in 2005, with a new CLR (to handle generics and nullable types) and compilers for C# 2 and VB 8.
3.0 – released in 2006, this is just 2.0 plus new libraries: Windows Presentation Foundation, Windows Communication Foundation, Workflow Foundation, and Cardspace
3.5 – released in 2007, this is 3.0 plus new libraries (primarily LINQ and some extra “base” libraries such as TimeZoneInfo) and new compilers (for C# 3 and VB 9)
4 – released in 2010, this includes a new CLR (v4), new libraries, and the DLR (Dynamic Language Runtime)
4.5 – released in 2012, this allows for WinRT development on Windows 8 as well as extra libraries – with much wider async APIs
C# language versions
There are five significant language versions:
C# 2, introducing generics, nullable types, anonymous methods, iterator blocks and some other more minor features
C# 3, introducing implicit typing, object and collection initializers, anonymous types, automatic properties, lambda expressions, extension methods, query expressions and some other minor features
C# 4, introducing dynamic typing, optional parameters, named arguments, and generic variance
C# 5, introducing asynchronous functions, caller info attributes, and a tweak to foreach iteration variable capture
For a long time, releases of Visual Studio were closely tied to framework releases. The picture has become a bit more flexible and complicated, however:
VS.NET 2002 – support for C# 1 and .NET 1.0
VS.NET 2003 – support for C# 1 and .NET 1.1
VS 2005 – support for C# 2 and .NET 2.0, and .NET 3.0 with an extension
VS 2008 – support for C# 3 and .NET 2.0, 3.0 and 3.5 (multi-targeting)
VS 2010 – support for C# 4 and .NET 2.0, 3.0, 3.5 and 4
VS 2012 – support for C# 5 and .NET 2.0 to 4.5 (including WinRT on Windows 8), and portable class libraries
That’s all the theory. Here are the practical limitations and working configurations. Note that this assumes you want to use Visual Studio – if you’re happy to use just the command line compiler, that’s a slightly different story which I’ll avoid for simplicity’s sake. (At some point I’ll return to this page to talk about C# 4 and C# 5 features, but not just now…)
You can’t use C# 2 features without at least VS 2005
You can’t use C# 3 features without VS 2008
You can’t ask VS 2005 or VS 2008 to target .NET 1.0 or 1.1 (there’s an extension for it, but I haven’t used it – expect some pain for debugging etc)
You can’t force VS 2008 to restrict you to only C# 2 features, or force VS 2005 to restrict you to C# 1 features
Each version of Visual Studio has its own project file format and will upgrade your older projects when you first load them in that version. (The differences between VS 2003 and VS 2005 were significant; the differences between VS 2005 and VS 2008 are much smaller.)
VS 2008 has special support (in project properties) for which framework version you want to target: 2.0, 3.0 or 3.5
You can use most C# 3 features when targeting .NET 2.0 or 3.0, but not quite all
You may found that there is no update on C# in VS2013. Yes, this is correct.
If you are going to install VS2012 Update 3/ Update 4, You may found out that a dialog box pops in the middle of the installation. It may look like this,
It is asking you for the location of the following files
1) Windows App Certification Kit x64-x86_en-us.msp
2) Windows App Certification Kit x86-x86_en-us.msp
3) Windows App Certification Kit Native Components-x64_en-us.msp
4) Windows App Certification Kit Native Components-x64_en-us.msp
There are 2 ways that you could get these files.
1) Download the VS2012.3.iso (if you are running Update 3) or VS2012.4.iso (if you are running Update 4). Exact the contents and you will found the files when navigate to “.\packages\WinACK\”
a. VS2012.3.iso (http://go.microsoft.com/fwlink/?LinkId=301705)
b. VS2012.4.iso (http://go.microsoft.com/?linkid=9833082)
2) Download the files directly,
a. Windows App Certification Kit x64-x86_en-us.msp ( http://go.microsoft.com/fwlink/?LinkId=283370&clcid=0×409)
b. Windows App Certification Kit Native Components-x64_en-us.msp (http://go.microsoft.com/fwlink/?LinkId=283372&clcid=0×409)
Start the Update 3 / Update 4 installer again. When it asks for these files, point it to the path where you downloaded the files. The installation should proceed after this and finish successfully.
I have experience on getting an error after install Visual Studio 2012 on a new Win7 professional machine.
‘Microsoft.VisualStudio.Editor.Implementation.EditorPackage’ package did not load correctly
After getting some searching and found out that the solution is pretty simple. Removing %LOCALAPPDATA%\Microsoft\VisualStudio\11.0\ComponentModelCache and restarting VS2012 fixed the problem for me. Hope this will help if you meet the same error.
If you are running Windows XP and/or Windows Server 2003 with SC Forefront Endpoint Protection installed, MsMpEng.exe crashes after definition update 22.214.171.124. The system also runs slowly and almost hangs.
Windows XP, Windows Server 2003
Disable Behavior Monitoring feature, either in the policy or via the SCEP UI.
Next Action from Microsoft:
We are pending a release of a definition update so BM can be enabled again. We will actively communicate out again as soon as the definition becomes available.
How to Disable Behavior Monitoring feature:
1. Configure Policy with SCCM
2. Configure Policy by GPO
Distribute the Machine Startup/Shutdown Script in registry by using GPO