"error CS1545: Property, indexer, or event is not supported by the language" on attempt to _read_ init-only property

[alexyakunin]

Describe the bug

Attempting to access any init-only property produces "error CS1545: Property, indexer, or event is not supported by the language" in dotnet-try tool.

Did this error occur while using dotnet try or online?

• [x] dotnet-try
• [ ] online

What kind of error was it?

• [ ] User Interface (UI): For example the output never displayed
• [ ] Service Error: For example "The service is temporarily unavailable. We are working on it"
• [ ] Other:

Screenshots

Please complete the following:

• OS
  • [x] Windows 10
  • [ ] macOS
  • [ ] Linux (Please specify distro)
  • [ ] iOS
  • [ ] Android
• Browser
  • [x] Chrome
  • [x] Edge
  • [ ] Safari

[alexyakunin]

The problem is severe: it prevents using dotnet-try w/ any NuGet packages involving this C# 9 feature.