Fixed MSBuild minimum req and updated documentation

README.md

@@ -36,8 +36,9 @@ Discussion about the transition of language design to the new repos is at https:
 
 ### Download C# and Visual Basic
 
-Want to start developing in C# and Visual Basic? Download [Visual Studio 2017](https://www.visualstudio.com/downloads/), 
-which has the latest features built-in. There are also [prebuilt Azure VM images](https://azuremarketplace.microsoft.com/en-us/marketplace/apps/category/compute?search=visual%20studio%202017) available with Visual Studio 2017 already installed.
+Want to start developing in C# and Visual Basic? Download [Visual Studio 2017](https://www.visualstudio.com/downloads/), which has the latest features built-in. There are 
+also [prebuilt Azure VM images](https://azuremarketplace.microsoft.com/en-us/marketplace/apps/category/compute?search=visual%20studio%202017) available with 
+Visual Studio 2017 already installed.
 
 To install the latest release without Visual Studio, run one of the following [nuget](https://dist.nuget.org/index.html) command lines:
 

build/Targets/Imports.targets

@@ -469,8 +469,8 @@
   <Target Name="BeforeBuild" Condition="'$(MSBuildRuntimeType)' != 'Core'">
     <ValidateBuildEnvironment
       MSBuildBinPath="$(MSBuildBinPath)"
-      MSBuildMinimumFileVersion="15.1.1012"
-      MSBuildMinimumDisplayVersion="MSBuild 15.1"
+      MSBuildMinimumFileVersion="15.3.409"
+      MSBuildMinimumDisplayVersion="MSBuild 15.3"
       />
 
     <Error 

docs/contributing/Building, Debugging, and Testing on Unix.md

 # Getting the Code
 
+1. Install the [.NET Core SDK](https://www.microsoft.com/net/download/core)
 1. Clone https://github.com/dotnet/roslyn
-1. Run `make toolset` to download the bootstrap compiler, mono and NuGet packages.
-1. Run `make` to build the code.  
+1. Run `dotnet restore CrossPlatform.sln`
+1. Run `dotnet build CrossPlatform.sln`
 
 # Running Tests
 
-After building run `make test` in order to run the unit tests.
+After building run `build\scrits\test.sh` in order to run the unit tests.
 
 # Contributing
 

docs/contributing/Building, Debugging, and Testing on Windows.md

@@ -11,13 +11,14 @@ Using the command line Roslyn can be developed using the following pattern:
 
 ## Developing with Visual Studio 2017
 
-1. [Visual Studio 2017 Update 3 Preview 1](https://www.visualstudio.com/vs/preview/)
+1. [Visual Studio 2017 Update 3](https://www.visualstudio.com/vs/)
     - Ensure C#, VB, MSBuild and Visual Studio Extensibility are included in the selected work loads
-    - Ensure Visual Studio is on Version "15.3 (25610.0-Preview)" or greater
+    - Ensure Visual Studio is on Version "15.3" or greater
+1. [.NET Core SDK 2.0](https://www.microsoft.com/net/download/core)
 1. Run Restore.cmd
 1. Open Roslyn.sln
 
-If you already installed Visual Studio and need to add the necessary work loads or move to update 1
+If you already installed Visual Studio and need to add the necessary work loads or move to update 3
 do the following:
 
 - Open the vs_installer.  Typically located at "C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe"

src/Compilers/CSharp/Portable/CSharpCodeAnalysis.csproj

@@ -92,4 +92,4 @@
   </ItemGroup>
   <Import Project="..\CSharpAnalyzerDriver\CSharpAnalyzerDriver.projitems" Label="Shared" />
   <Import Project="..\..\..\..\build\Targets\Imports.targets" />
-</Project>
\ No newline at end of file
+</Project>