I've installed Visual Studio 2015 and am completely new to it. I'm trying to install the Azure SDK for .NET (version 2.8.1) and every time I try to install it, I get an error. The error is, "Azure Storage Emulator requires LocalDb to be installed. You must enable Microsoft SQL Server Data Tools feature in Visual Studio 2015 to install Local Db before proceeding. Where in the world do I go to fix this? I have not a clue.