Silverlight 4: Microsoft.Silverlight.CSharp.targets permission not found?

Question

I upgraded some Silverlight 3 applications to Silverlight 4 in Visual Studio 2010. My Silverlight 3 applications work fine in Visual Studio, but there is no following error in SL4 applications:

C:\Path\To\MyProject.csproj : error : Unable to read the project file 'XNTVOD.AdminClient.csproj'. C:\Path\To\MyProject.csproj(593,3): The imported project "C:\Program Files (x86)\MSBuild\Microsoft\Silverlight\v4.0\Microsoft.Silverlight.CSharp.targets" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.

I had a problem with old VS Silverlight components and recently removed most of the SL components, and now in "Add or Remove Programs" I have:

• Microsoft silverlight
• Microsoft Silverlight 3 SDK
• Microsoft Silverlight 4 Toolkit April 2010

The <import> declaration looks like this for the SL4 project:

<Import Project="$(MSBuildExtensionsPath32)\Microsoft\Silverlight\$(SilverlightVersion)\Microsoft.Silverlight.CSharp.targets" />

There are only two files in this folder C:\Program Files (x86)\MSBuild\Microsoft\Silverlight\v4.0 :

Microsoft.Ria.Client.targets

Microsoft.Ria.Client.VisualStudio.targets

Which Silverlight development component am I missing in particular? I see many different options: from Silverlight 4 SDK Beta to VS Tools for Silverlight 4 and several others. I do not want to install things that will return me back to the situation that I had before, with outdated components.

Answer 1

Looks like this is the missing part ...

Silverlight 4 Tools for Visual Studio 2010

Answer 2

A file that skips ships in the Silverlight 4 SDK. You can only install the Silverlight 4 SDK or reinstall all Silverlight 4 Tools for VS2010 (which reinstalls the developer runtime, SDK, patch for VS2010, Silverlight 4 Tools, and WCF RIA services).

Answer 3

You can get this with Silverlight version 4 projects when you try to open in version 5 if version 4 bits are not on this computer. What worked for me (after several hours of trying everything) is to edit the csproj file and change the target version of silverlight

 <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> 

4 to 5

Answer 4

This worked for me ... also had to install Silverlight 4 Developer runtime

Answer 5

Afer many attempts, which worked for me: 1. go to add or remove programs 2. Uninstall all versions of Silverlight (4, 5 or even if no version is specified, uninstall it too!) 3. install Silverlight 4 SDK 4. install Silverlight 5 for developers Finally, the project opened in VS 2010 SP1

Answer 6

A previously working installation may break when installing a new version of TFS on the server (or whatever it is related to my MSBuild).

My “target” files disappeared from C:\Program Files (x86)\MSBuild\Microsoft\Silverlight\v5.0 on the 2012 server and reinstalled the tools.

I believe that you can simply copy target files from another computer, but not 100% sure.