botbuilder-dotnet/global.json

{
  "sdk": {
    "version": "6.x",
    "rollForward": "latestFeature"
  },
  "msbuild-sdks": {
    "Microsoft.Build.CentralPackageVersions": "2.0.147",
    "Microsoft.Build.Traversal": "3.0.54"
  }
}