In my previous post, I explained about Generics. C# also provides generic methods. We can create a method that defers the parameter data type until the method is called. These parameters are called type parameters, which means we can pass the actual data type later. Below is an example of …
Generics are introduced in C# 2.0. It is the most powerful features of C#. In C# 1.0, when we design a class that use other types that is not known at defining the structure of the class, then type should be an object type. In the class, we have to …
C# ArrayList is a non-generic dynamic size collection class. ArrayList class exists in System.Collections namespace. ArrayList are dynamic means we can add any number of items without specifying the size of it. ArrayList vs Array ArrayList and Array looks same. But there are some major differences between them. Differences are: …
C# Hashtable class is a collection class where we can store data in the key/value pair. Hashtable is not type-safe. Hashtable is not generic and both key and value are based on object type. Hashtable is used to store unique keys data. If we try to assign value to already used key, …
This article is an introduction to the C# using statement and explain why and how to use it. I’ll also describe features of using statement and examples of nested using. In C#, every object is using some resources managed or unmanaged internally. Client is responsible for life cycle of the object. Life …
Visitor design pattern allows you to add new behaviors to an existing object without changing the object structure. Visitor pattern separates the non-related behaviors from the object and put them into a separate object. Visitor pattern creates a separate object for each new functionality. This pattern supports both single responsibility and open/closed SOLID principles. By …
In Template Method design pattern, we define our specific algorithm in the base class. A algorithm can compose of several methods. At designing the base class, we don’t know the implementation of some methods and we mark these methods as abstract so that subclasses can implement these methods. A method in the base class …
Flyweight design pattern supports sharing of objects. In project, sometimes we have similar kinds of objects. Each object have two types of data. Intrinsic: This data is unique in all objects. Extrinsic: This data is common in all objects. Flyweight pattern gives you a pattern to design these objects lightweight by sharing the …
Strategy design pattern provides a family of algorithms. Each algorithm implements a single interface and all the algorithms are interchangeable. Client use the interface of the algorithm and can change the algorithm at runtime. Strategy pattern provides loosely coupling between the client and the algorithms. Structure Participants IStrategy: Defines an algorithm …
Memento design pattern provides the ability to store and restore object’s internal state without breaking encapsulation. This pattern is useful when we have to support undo or redo operations over an object. In OOPS, every object has internal state. To support undo/redo operations, we must save the state to somewhere. But due to encapsulation, object …