Best practices regarding object lifetimes (InfluxDBClient, WriteApi)

// tried feature request and it didn't work, I swear!

__Proposal:__
Line out best practices in the documentation how to efficiently write to InfluxDB using the C# SDK

__Current behavior:__
I'm uncertain which object to keep as a singleton and which ones to keep transient.
Currently I am holding on to my InfluxDBClient instance and create a new WriteApi instance every single time I need to write a new measurement.

__Desired behavior:__
Explanation how to be efficient.

Start by reviewing the C# SDK documentation for InfluxDBClient and WriteApi, focusing on the current guidance for object lifetimes and write usage. The documentation is done when it clearly explains which objects to retain or recreate and how to write measurements efficiently.

Written by the indexing model from the issue text.