Expression Trees in Visua Basic and C#

摘要

Imagine if you had Objects that represented parts of a program. Your code could combine these parts in various ways, creating an object that represented a new program. You could compile this object into a new program and run it; your program could even rewrite its own logic. You could passthisobject to a different environment, where the individual parts would be parsed as a set of instructions to be run in this other environment. Welcome to expression trees. This article aims to provide a high-level overview of expression trees, their use in modeling code operations and runtime code compilation, and how to create and transform them.