Design patterns and practices in .NET: the Strategy Pattern

Introduction

The strategy pattern is one of the simplest patterns to implement. Have you ever written code with ugly if-else statements where you check some condition and then call another method accordingly? Even worse: have you written if-else statements to check the type of an object and then called another method depending on that? That’s not really object-oriented, right? The strategy pattern will help you clean up the mess by turning the if statements into objects – aka strategies – where the objects implement the same interface. Therefore they can be injected into another object that has a dependency of that interface and which will have no knowledge of the actual concrete type.

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