Do Silverlight 4 applications require that they target .NET 4.
With the delay in .NET 4 and Visual Studio 2010; can I still get the advantages of Silverlight 4 running against the .NET 3.5 framework?
Silverlight does not require any version of .NET (or, put another way, it includes its own sorta-kinda version of .NET; at any rate, it doesn't need any version of the full .NET runtime). It is a completely independent runtime.
Related
I have external .net library compiled with .net framework 4 (it's provider moved recently to .net 4)
My code currently runs on .net framework 3.5
How to use that external library in my application ?
Moving whole application to .net 4 needs time and testing, so maybe in a future i will do that, but now, what are the possibilities ?
There are no possibilities, the CLR version that comes with .NET 3.5 cannot load 4.0 assemblies. The metadata format was changed. You have to force your app to use the .NET 4.0 CLR version. Do so by recompiling it with VS2010, targeting 4.0, or by using a .config file that contains the <requestedRuntime> element to ask for "v4.0".
Compatibility for .NET 4.0 is excellent btw.
While you cannot load the .Net DLL directly, you can wrap it in a COM interface, and load that COM interface in your .Net 3.5 process.
See Using a .NET 4 Based DLL From a .NET 2 Based Application
For more background information, Microsoft originally added In-Process Side-by-Side in .Net 4 to better support the scenario where an application loads add-ins via COM, and the add-ins were written with various versions of .Net. The ability to load .Net 4 DLLs in a .Net 3.5 process is just a nice side effect of that.
We have a large & complex system running under .Net 4.0. We want to start introducing code written for .Net 4.5, but can't (yet) assume that .Net 4.5 is installed on all the developer machines, build machines and test labs. So I'm looking for a way to compile certain projects in MSBuild using assemblies which are available on disk, on machines which have only .Net 4.0 installed.
Per the documentation it seems possible. The 4.5 reference assemblies are available in the msbuild environment, and I've been experimenting with the TargetFrameworkVersion, FrameworkPathOverride and TargetFrameworkMoniker attributes, but so far without success.
Any hints, suggestions or working samples would be most helpful.
To build a .NET Framework 4.5 application, you must also have the .NET Framework 4.5 reference assemblies.
Installation
The .NET Framework 4.5 replaces the common language runtime (CLR), targets, tasks, and tools of the .NET Framework 4 without renaming them. Essentially, it creates a modified and improved .NET Framework 4.
.NET 4 has a new CLR.
If I install the V4 framework on a PC will it install if there are NO earlier framework versions on that PC? Also, will my WinForms applications, targeted at .NET 4 run smoothly with no other framework installed?
Yes your app will run smoothly. .net 4 is not dependent on previous versions.
.Net 4 is dependent on something called Windows Imaging Component and Windows installer 3.1
For testing purposes, I installed .Net Framework 4 Client Profile. My tests ended and I was to uninstall it, in order to install .Net Framework 4 full. The uninstaller told me to uninstall .Net Framework 4 extended first.
I've already found it and uninstalled, but the question remains: What is .Net Framework 4 extended?
Got this from Bing. Seems Microsoft has removed some features from the core framework and added it to a separate optional(?) framework component.
To quote from MSDN (http://msdn.microsoft.com/en-us/library/cc656912.aspx)
The .NET Framework 4 Client Profile
does not include the following
features. You must install the .NET
Framework 4 to use these features in
your application:
* ASP.NET
* Advanced Windows Communication Foundation (WCF) functionality
* .NET Framework Data Provider for Oracle
* MSBuild for compiling
It's the part of the .NET Framework that isn't contained within the Client Profile. See MSDN for more info; specifically:
The .NET Framework is made up of the .NET Framework 4 Client Profile and .NET Framework 4 Extended components that exist separately in Programs and Features.
Presently .Net 4.0 is not supported on Azure.
This thread indicates that you will not be able to use .Net 4.0 with VS 2010 until it is supported in the cloud.
http://social.msdn.microsoft.com
I'd like a way to start developing Azure applications locally utilizing the new features of .Net 4.0. I am fine with not being able to deploy these applications until Azure officially supports it.
From within the VS IDE; I tried replacing .Net 3.5 application references with newer .Net 4.0 references and Visual Studio crashes.
Does anyone have any suggestions?
Thanks,
Paul
An update to this old thread. .Net 4.0 has been supported since Azure SDK 1.2
Some features from .NET 4.0 can be added to your application through other means. For example, the recently-released Reactive Extensions for .NET 3.5 SP1 includes a back ported release of Parallel Extensions. And the Managed Extensibility Framework contains the Lazy class and Tuple struct. As long as you set "Copy Local" to true on any libraries that you add, your application should run (and deploy) successfully.
Obviously, these aren't all the features that are new in .NET 4.0, and not all of them will can be ported back to .NET 3.5 like these can.