re: Why is FrameworkVersionMismatchException thrown? (Hamed Ahmadi)

VSTOTeam — Fri, 09 Apr 2010 20:18:02 GMT

Yes, you can target 3.5 and still develop solutions for Office 2010. As I mentioned in the last paragraph of the post, this exception does not have anything to do with your customization not loading. you can set the VSTO_SUPPRESSDISPLAYALERTS to 0 and set the loadbehavior to 3 for you addin, and restart the Outlook to see the "real" problem. for more questions, please refer to VSTO forum: http://social.msdn.microsoft.com/Forums/en-US/vsto/threads.

Hamed

re: Why is FrameworkVersionMismatchException thrown? (Hamed Ahmadi)

Furqan — Fri, 09 Apr 2010 06:26:37 GMT

I have created an Outlook 2010 addin using Visual studio 2010 and VSTO 4.0. targeting .NET fw 3.5. I am trying to customize explorer ribbon by addind a custom tab. When I launch outlook 2010, i get the following error in event viewer and the addin manager says: "There was a runtime error when loading the addin".

Customization URI: file:///c:/documents and settings/eiuser200/my documents/visual studio 2010/Projects/OutlookAddIn1/OutlookAddIn1/bin/Debug/OutlookAddIn1.vsto

Exception: <compatibleFrameworks xmlns="urn:schemas-microsoft-com:clickonce.v2">

</compatibleFrameworks>

************** Exception Text **************

Microsoft.VisualStudio.Tools.Applications.Deployment.FrameworkVersionMismatchException: <compatibleFrameworks xmlns="urn:schemas-microsoft-com:clickonce.v2">

</compatibleFrameworks>

at Microsoft.VisualStudio.Tools.Office.Runtime.SolutionInstaller.Install(ClickOnceAddInDeploymentManager clickOnceAddInDeploymentManager, OfficeAddInDeploymentManager officeDeploymentManager, AddInInformation& info)

at Microsoft.VisualStudio.Tools.Office.Runtime.SolutionInstaller.ProcessInstallerOperation(ClickOnceAddInDeploymentManager clickOnceAddInDeploymentManager, OfficeAddInDeploymentManager officeAddInDeploymentManager, AddInInformation& info)

at Microsoft.VisualStudio.Tools.Office.Runtime.DomainCreator.CreateCustomizationDomainInternal(String solutionLocation, String manifestName, String documentName, Boolean showUIDuringDeployment, IntPtr hostServiceProvider, IntPtr& executor)

Can I target 3.5 framework with VSTO 4.0 and still leverage the new Outlook 2010 platform features (Explorer ribbon,backstage view)?

Thanks,

Furqan