Note : this project Template extension is only compatible with Visual Studio 2017.

Download and install XrmToolBox Template from Visual Studio gallery

Go to this page to download the extension

Double click on XrmToolBox_PluginTemplate.vsix file you just downloaded

On the opened dialog, click on Install button

Wait for the installation to complete

Open Microsoft Visual Studio 2017

Click on menu Tools > Extensions and updates

On the opened dialog, select Online then type XrmToolBox in the search bar

Click on button Download to install the extension