IVsExtensionManager::InstallProgressChanged Event
Visual Studio 2015
Event that is fired as progress is made after an installation is started by using the InstallAsync method.
Assembly: Microsoft.VisualStudio.ExtensionManager (in Microsoft.VisualStudio.ExtensionManager.dll)
Although this API supports the Extension Manager infrastructure, we recommend that you do not use it because it is subject to change.
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