After successfully deploy an app to my own web hosting site (IIS) , I tried to do it again to Microsoft Azure, but got this strange error message from Visual Studio at the end of running the publish wizard.
Sequence contains more than one matching element
It turns out that if you have switched your publish targets or if you have manually updated/removed settings from your .lsxtproj or .lsproj for previous version of lightswitch, you need to manually update the setting of “.lsxtproj”

<RemotePublish>False</RemotePublish> 

<RemotePublish>True</RemotePublish>

Deploy to Azure error