Visual studio installation and sqlserver installation, studiosqlserver
Check SQL server before visual studio to avoid repeated installation directories (SQL Server contains some visual and visual studio also contains some sqlserver content)
Visual studio 2015 has too many features to be installed. If you choose to complete the installation, Visual Studio is a very large product that contains a large number of third-party software and requires nearly 30 GB of disk space, this includes the Android SDK Development Kit, Java Developer Kit (JDK), and Windows and Android simulators. (The android SDK is subject to network restrictions in some regions and cannot be downloaded and installed normally)
Click Reset Default Option
C # selects only C #. c ++ selects only c ++ and removes all other default options.
Then, if you need to use a feature that is not installed, you can re-Add the feature.