Handling Microsoft’s refactoring between Net3.5 and Net4.0

By -

I have a web server control library (the real stuff, not user controls) that I often include in web sites. While building a 4.0 site,  I encountered:

 

The type name 'MembershipUser' could not be found. This type has been forwarded to assembly 'System.Web.ApplicationServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Consider adding a reference to that assembly. 

 

Ah! Microsoft has done some refactoring in their class libraries. Wrong, the class libraries are the same, they just moved the dll that it is located in!  In Object Viewer, you will see:
image

So all that needs to be done is add a reference to this DLL.

image

I am not happy with how they did it --- it breaks normative conventions…. The DLL. “System.Web.ApplicationServices” does not contain a class called: System.Web.ApplicationServices.

Second,  the two classes in it would be flagged as a misplacement in any respectable code review!

 

In terms of maintaining one code base that will support .Net2 thru .Net4, it may be done by using two projects:

  • MyProject.Net2.csproj
  • MyProject.Net4.csproj

with the .cs files being shared.  In this case the members of the classes appear unchanged, but if they were changed then I would need to add a C# directive  “NET4”  and conditionally code – still allows me to maintain a single .cs file for each of the control.

Comments

Post a Comment

Popular posts from this blog

Simple WP7 Mango App for Background Tasks, Toast, and Tiles: Code Explanation

By -
Image
This is a continuation of this post , explaining how the sample app works. Caution : This sample isn’t meant as an example of best patterns and practices. If you see something in the code you would never do, then don’t. Solution File Organization The app has three Visual Studio Projects: the app, the agent, and the shared code library between them. One of the great things about Mango is that now the built-in Visual Studio Unit test functionality is available. By separating out the meat of the work into the SampleShared project, I can also focus my unit testing there. SampleApp1 The app has a MainPage, a ViewModel, and the WMAppManifest.xml file modified to note my ExtendedTask of BackgroundServiceAgent. The Agent is extremely simple with a call to the shared library, an update to the Tile, and a call to pop up Toast. The meat of the work is in the SampleShared library. The AgentMgr manages the background agent : add, remove, find, run now. It is only called f...
Read more

Yet once more into the breech (of altered programming logic)

By -
Once upon a time, long long ago, I wrote 8-bit programs in Tiny-C with absolute addressing being the only reality.  Then we had Borland Turbo-C with relative addresses and the joys of relative assembly jumps. Enter Windows and the joys of locking and unlocking memory blocks that you must allocated and manage yourself. Then came Visual Basic which evolved into .Net CLR and decreasing awareness of what is happening under the hood.   With VS2010 including F# and enhanced parallelism in .Net4, we actually have to go retro a bit – back to the world of having to understand the hardware. CPU speeds are no longer increasing – I have an old laptop from six+ years ago that ran at 3.2 GHz. This year I updated one of my machines off-the-shelf from Costco.com, an I7-920 with 4 cores and hyper-threading (8 CPUs appears in Task Manager) and 12 GB of DDR3 RAM. This week I ordered from Costco a Phenom II X6 (Yes – 6 REAL CORES) for one of my daughters.  This CPU will (according to Yo...
Read more

Error : /ScriptResource.axd : Invalid viewstate.

By -
This issue is caused when the ScriptResource.axd querystring parameters can not be decoded on the server. This error can be caused from multiple issues with server configuration or the Browser's interaction with the server. The ScriptResource.axd contains all of the clientside javascript routines for Ajax. Just because you include a scriptmanager that loads a script file it will never appear as a ScriptResource.AXD - instead it will be merely passed as the .js file you send if you reference a external script file. In other words it is what the Microsoft Ajax libraries inject into your HTML to allow them to access their javascript functions they need for page manipulation. ASP.NET will use the machine key to encrypt the ScriptResource.axd (and webresource.axd) url's parameters(in querystring), and by default the machinekey is a randomly generated one which may involve the current time. By default there is a different machinekey on every machine, and it changes when the applic...
Read more