Merge pull request #2434 from sharwell/netstandard-config

Updated instructions for enabling configuration in VS 2017

Author: sharwell

documentation/EnableConfiguration.md

@@ -4,6 +4,14 @@ At this time, the code fix is not able to fully configure the newly-created **st
 tracked in bug report [dotnet/roslyn#4655](https://github.com/dotnet/roslyn/issues/4655). In the mean time, users must
 manually perform the following additional steps after creating the **stylecop.json** file.
 
+In Visual Studio 2017:
+
+1. Select the file in **Solution Explorer**.
+2. In the **Properties** window, set the value for **Build Action** to:
+    * For most projects: **AdditionalFiles**
+    * For projects using the new project system, including .NET Core and .NET Standard projects: **C# analyzer
+      additional file**.
+
 In Visual Studio 2015 Update 3 and newer:
 
 1. Select the file in **Solution Explorer**.