C# in Depth

Lambda expressionsand expression treesThis chapter covers■■■■■■■Lambda expression syntaxConversions from lambdas to delegatesExpression tree framework classesConversions from lambdas to expression treesWhy expression trees matterChanges to type inferenceChanges to overload resolutionIn chapter 5 we saw how C# 2 made delegates much easier to use due to implicitconversions of method groups, anonymous methods, and parameter covariance.This is enough to make event subscription significantly simpler and more readable,but delegates in C# 2 are still too bulky to be used all the time: a page of code full ofanonymous methods is quite painful to read, and you certainly wouldn’t want tostart putting multiple anonymous methods in a single statement on a regular basis.One of the fundamental building blocks of LINQ is the ability to create pipelinesof operations, along with any state required by those operations. These operations230Licensed to Rhona Hadida