How do I deploy only 1 or 2 dlls for second time deployment of click-once application?
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43answers:
1ClickOnce creates a hash for every file being deployed. When a client starts an application the hashes on their local files are compared to the hashes on the server so it knows what files to download.
I'm guessing you want to deploy a single assembly even though multiple assemblies may have changed. That's the problem with creating deployments in Visual Studio, you don't have a choice on what goes into your deployment. If you didn't change any code but simply built a project, that assembly will be deployed because its hash changed.
If you want to have more control over what gets deployed, skip Visual Studio and create your deployments with MageUI. You can start with the files already being deployed, overwrite with the new assemblies you want to deploy, and point Mage at that folder to create the deployment from.