Follow these steps to change the name of your application:
Make sure your installation project is open in Visual Studio.
Click the project root level icon in Solution Explorer.
In the properties window, change the ProductName property to "XYZ" or whatever you want the installer to display your application name.

Restore the installation project.
Now, if you right-click on the project icon in the solution explorer and click "Install", the installation program starts and you can verify the correct display name of the application.
It's also worth exploring the other deployment features that are available for installation projects to make sure they are set appropriately for your application.
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