add vs4mac and vscode sections

release-notes/2.0/2.0.0-preview1-known-issues.md

@@ -39,4 +39,18 @@ Adding `<PackProjectInputFile>$(MSBuildProjectFile)</PackProjectInputFile>` to y
 
 ### Unit Test Templates Do Not Exist
 
-Unit test templates don’t exist in Preview 1 because test discovery fails for VB projects. This issue is under investigation and there is no workaround at this time.
+Unit test templates don’t exist in Preview 1 because test discovery fails for VB projects. This issue is under investigation and there is no workaround at this time.
+
+### Visual Studio for Mac
+
+There are a [few items to be aware of](https://gist.github.com/mrward/70b8132003ef77d893111ecbea3e2225) if you are using .NET Core 2.0 with Visual Studio for Mac.
+
+### Visual Studio Code
+
+If you want to try .NET Core 2.0 with Visual Studio Code, you will need to use an updated C# Extension.
+
+1. If you haven't already, install [Visual Studio Code](https://code.visualstudio.com).
+1. Download the VSIX for the [latest C# Extension](https://github.com/OmniSharp/omnisharp-vscode/releases/download/v1.10.0-beta2/csharp-1.10.0-beta2.vsix).
+1. Follow the instructions from [Installing Beta Releases](https://github.com/OmniSharp/omnisharp-vscode/wiki/Installing-Beta-Releases). **Note:** If you already have C# for VS Code installed, you’ll want to uninstall it and relaunch VS Code before installing the beta.
+
+If you try out the C# for VS Code bits and find any issues, please file them at [OmniSharp/omnisharp-vscode](https://github.com/OmniSharp/omnisharp-vscode/issues).