General : Run FxCop on this code base (or some more modern analog)
https://docs.microsoft.com/en-us/previous-versions/dotnet/netframework-3.0/bb429476(v=vs.80)?redirectedfrom=MSDN
also run
https://github.com/StyleCop

File : SODA.Tests/SodcaClientTests.cs

• From the readme it looks like we are renaming DSMAPI intannces to SODAClient. Here we are naming tests with DSMAPI in them and I wonder if we should convert to using SODAClient throughout?
  File : SODA/SodaClient.cs
• Some instances where you use str == null to check values when its probably ok to use the IsNullOrEmpty() function as you do in other locations

File : README.md

• you can use this formulation to avoid all the extra escape chars in your example code : string path1 = @"c:\temp\MyTest.txt";

File : SODA/PipelineJob.cs

• public string Username => publis string username to match other variable use in the files.

@PeterAustinMoore this is a tremendous effort, thank you for submitting the PR!

I haven't had the time to fully dig in and review yet, but I wanted to let you know its on our radar. One thing that would greatly help the review is if you could rebase your branch on master (we had some in-flight changes that were just released yesterday).

I can't promise when we'll get to this, but we are definitely interested in folding in the functionality. Stay tuned!