DotnetStandardStreams/source/DotnetStandardStreamsApp/Properties/launchSettings.json

{
  "profiles": {
    "StreamsTest": {
      "commandName": "Project",
      "commandLineArgs": "C:\\Users\\Phil\\source\\repos\\DotnetStandardStreams\\DotnetStandardStreamsApp\\delme.txt",
      "sqlDebugging": true
    }
  }
}