I have written quite a bit of C# code in Visual Studio but this is my first attempt at using vscode to write a Net Core app. I am using the sample code here and it builds and runs just fine, though vscode shows the red error lines under the internal class TelePrompterConfig defined in a separate file (config.cs).
What do I need to do to clear the error in vscode? See the image below for the details. Again, this is a vscode error, not a C# error.
Edit: added #omnisharp tag.