XNA Game failing to deploy to WP7 Emulator

This use to work, I can't tell what I broke... but I suspect it is something to do with the WMAAppManifest / Guid...

When I attempt to Deply/Debug to the WP7 Emulator from VS I get the following popup message: "The application c开发者_如何学Pythonould not be launched for debugging. Verify that the application is installed on the target device."

What I actually want to do is deploy to the emulator in code using the Microsoft.Smartdevice.Connectivity assembly. The error message I am getting there is perhaps more informative.

        app = WP7Device.InstallApplication(
            ApplicationGuid,
            ApplicationGuid,
            "NormalApp",
            outputPathAbsolute + "GameThumbnail.png",
            outputPathAbsolute + xapFilename                
            );

...Generates the following exception, "Installation of the application failed. XAP package signature is not valid or the WP manifest file is invalid. Re-sign with valid signature and fix the manifest file."

I have verified that the path to the XAP is correct, and the value of the ApplicationGuid parameter matches this value in my WMAppManifest.xml "ProductID="{4b8343da-c890-423b-9b76-2754015174cf}".

So... "Re-sign with a valid signature and fix the manifest file." If that is really the problem, how?

Edit:

So I opened the XAP with IZarc and behold, the WMAppManifest inside it is NOT the one in my project, and has a different Guid. How is this possible?

I also found this problem during deploymet of my Application. The solution is simple - you must replace 1st argument of InstallApplication method with Product GUID (which is different from Application GUID). You can find Product GUID in Properties\WMAppManifest.xml file, inside tag. 2nd argument must be guid from AssemblyInfo.cs.

Right click on the solution and select properties. After selecting the properties go to configuration properties and check the build and deploy option.