Hi everybody,
I recently had an issue with the Microsoft Advertising SDK for WinRT.
I can’t compile without an error (I found a tip – remove reference/compile/add reference/compile – but I can’t compile for making an app package).
The famous error is :
error APPX1712: The .winmd file ‘Microsoft.Advertising.WinRT.UI.winmd’ contains duplicate type names. Type ‘Microsoft.Advertising.WinRT.UI.AdControl’ is already registered with the in-process server ‘CLRHost.dll’.
1>C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v11.0\AppxPackage\Microsoft.AppXPackage.Targets(803,9): error APPX1712: The .winmd file ‘Microsoft.Advertising.WinRT.UI.winmd’ contains duplicate type names. Type ‘Microsoft.Advertising.WinRT.UI.XamlAdControl_XamlTypeInfo.XamlMetaDataProvider’ is already registered with the in-process server ‘CLRHost.dll’.
What the hell is ? It’s just a bogous statment, my project is maybe not typical : I use some library, and it seems the compiler does not like that.
HOW TO RESOLVE ?
I found a lot of posts on The Internet and non solve this issue. I spent a lot of time to find this :
1. Open with notepad the SDKManifest.xml in C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0\ExtensionSDKs\MSAdvertisingXaml\6.1\SDKManifest.xml with administrator rights
2. Edit this line <File Reference = “Microsoft.Advertising.WinRT.UI.winmd” >
3 .Modify by <File Reference = “Microsoft.Advertising.WinRT.UI.winmd” Implementation=”Microsoft.Advertising.WinRT.UI.winmd” >
4. Recompile and enjoy
That’s all, everything works perfect after that 
EDIT
Unfortunately, this works but the certification kit fails with that stuff (I mean advertising load in the DLL).
How to do : I referenced the SDK in the EXE, and Loaded in the DLL by Reflection the Type (Microsoft.Advertising.WinRT.UI.AdControl) referenced in the EXE.
Just a crappy stuff because of a bogus SDK : but it works and certification kit is happy !
Stephane