I am working on an old application in .NET 4.5.2. I need to upgrade the app insights nuget package from Microsoft.ApplicationInsights.2.18.0-beta3 to 2.21.0. The code currently (2.18.0-beta3) has TelemetryClient which was referenced with using Microsoft.ApplicationInsights; but after the upgrade, the TelemetryClient is no longer in that namespace, nor is it in any other namespace in that nuget package. Where can I get access to the app insights TelemetryClient?
This is what I see: