ShamilS questions

• IndexOf matching when Unicode 0xFFFD is in the string - bug or feature?
• System.Data.OleDb.OleDbConnectionInternal..ctor: Unspecified error
• node.js/karma/end-to-end testing: failed to proxy /app/index.html (Error: connect ECONNREFUSED)
• VSCode 1.39.x & Python 3.7.x: "ImportError: attempted relative import with no known parent package" - when started without debugging (CTRL+F5))
• .NET Core 1.0 equivalent for System.Threading.Thread.CurrentThread.ManagedThreadId

ShamilS answers