Use the 'Download all, then install' feature If you are an enterprise IT administrator who wants to perform a deployment of Visual Studio to a network of client workstations, refer to our Visual Studio Administrators Guide. You can use the Download all, then install feature from the Visual Studio Installer to download the files to a local cache on the local machine before you install, or you can use the command line to create a local cache of the files to install later. For situations like these, we've made a few other methods available for acquiring Visual Studio. For example, you might have an unreliable internet connection or your internet connection may have low bandwidth. However, sometimes online access is problematic.

We recommend that you use the Visual Studio Installer, which is a small file that checks for online updates on a regular basis and helps you stay current with all the latest fixes and features. We designed Visual Studio to work well in various network and computer configurations. Create an offline installation of Visual Studio

Visual studio 2019 offline