IKernelLink — communicate with a Wolfram Language kernel

IMathLink — low-level methods for communicating with any WSTP program

MathKernel — high-level class for interacting with the Wolfram Language

MathLinkFactory — create links

MathLinkException — link errors

Representing & Storing Expressions

Expr — .NET representation of Wolfram Language expressions

ILoopbackLink — temporary storage for expressions

User Interface Components

MathPictureBox — display Wolfram Language graphics and typeset output

ConsoleWindow — display .NET console output

DoubleBufferedPanel — double-buffered drawing

Event Handlers

MessageHandler — method for handling the MessageArrived event

PacketHandler — method for handling the PacketArrived event

YieldFunction — method for handling the Yield event