[CE 10.16.02.34] C# equivalent of PrintDescriptionRef

Is there a C# equivalent to the `PrintDescriptionRef` class found in the C(++) API?

I'm trying to convert the PrintDesc.cpp print example found in the SDK :

// Create a print description instance.
PrintDescriptionPtr printDescPtr = PrintDescriptionRef::Create();
IPrintDescriptionP printDesc = printDescPtr->GetP();

// Initialize the print description to use the PDF printer driver
// configuration and the active session.
if (SUCCESS != printDesc->InitializeFromTCB (L"pdf.pltcfg"))
....

But am unable to create a PrintDescription because no such class is found, having referenced the following DLL's:
- Bentley.PrintAPI
- Bentley.PrintEngine
- Bentley.PrinterConfigurationEditor
- Bentley.PrintFoundation
- Bentley.PrintHandlers
- Bentley.PrintManager
- Bentley.PrintOrganizer

I've looked through MSTNPlatform.NET.chm and DgnPlatformNet.chm to see if there were any similarly named classes, but came up short, finding only IPrintDefinition related pages.

I am trying to create an mdl addin that runs one of our standard pltcfg's in the middle of some other processes without requiring user input.
Is there one such class in C#, or is there a different named class that can do this?