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.netvisual-studiosilverlightvisual-studio-2013silverlight-5.0

Can Silverlight OOB or WebHosted be built under x64 platform?

I made a test SL5 OOB project and tried to build under x64 platform but I get the warning:

"Assembly generation -- Referenced assembly 'CommonLanguageRuntimeLibrary' targets a different processor".

and an error:

Error 2 Could not load file or assembly 'file:///C:\work\TestSilverlightOOB\TestSilverlightOOB\obj\x64\Debug\TestSilverlightOOB.dll' or one of its dependencies. An attempt was made to load a program with an incorrect format. C:\Program Files (x86)\MSBuild\Microsoft\Silverlight\v5.0\Microsoft.Silverlight.Common.targets 214 9 TestSilverlightOOB

Same for WebHosted with RIA enabled.

Solution

  • Finally the answer to the questions is no. Silverlight apps cannot be build as x64 apps.

    The reason is the references from here

    c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\Silverlight\v5.0

    are x86 and there is no x64 SDK for Silverlight 5