Calling query results from Powershell into C#

Question

I am new to Powershell.

I am trying to insert the query results of this Powershell code into C# variable called "results".

I got the C# sample code from here to get the result of Powershell into C#.

var results = ps.Invoke();
foreach (var psobject in results)
{
  var myInteger = Convert.ToInt32(psobject.Members["SomeField"].Value);
}

By looking at this Powershell code, on line 39 and 40,

# results of query
[Intacct.SDK.Xml.OnlineResponse]$Response = $task.Result

the object name for the query results seems to be [Intacct.SDK.Xml.OnlineResponse]$Response. Is it?

1) What would be expression to get the result of this Powershell and put inside C#?

2) Do I have to install PowerShell Tool into Visual Studio to see the "PowerShell" object to be recognized (shows up without an error)?

And, why is this extension trial version?

I am trying to understand how powershell code works within C# solution.

3) Do I just create ps1 code like this and add to the solution? Thank you.