How do I update my custom extension in Visual Studio without requiring it to be uninstalled first?

Question

I have created a custom Visual Studio extension and have deployed via a internal Extension Gallery. When I make an update to my extension, it correctly shows up in Visual Studio Extensions and Updates as needing an update.

When I click Update and then Install on my extension, it gives me this error:

The extension could not be installed because the following error occurred:

My Custom Extension is already installed.

How do I update my custom extension in Visual Studio without requiring it to be uninstalled first?

Answer 1

Found my error: I did not update the version number in the .vsixmanifest file.

face palm

I updated the version in AssemblyInfo.cs, the atom.xml, but forgot the most important .vsixmanifest file.