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Design Pattern in .NET 101 - Abstract Factory Pattern (Creational Pattern)
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Abstract Factory pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes.
E.g. I have a DocumentFactory class that either returns DefaultDocumentFactory or CustomDocumentFactory dependening on the environment variable.
using System;
using System.Collections.Generic;
using System.Text;
namespace AbstractFactory
{
abstract class DocumentFactory
{
[…]
Design Pattern in .NET 101 - Factory Method Pattern (Creational Pattern)
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Factory Method Pattern defines an interface for creating an object, but let subclasses decide which class to instantiate. It lets a class defer instantiation to subclasses.
E.g., I defined a abstract News class.
using System;
using System.Collections.Generic;
using System.Text;
namespace FactoryPattern
{
abstract class News
{
}
}
Different kinds of […]
Design Pattern in .NET 101 - Facade Pattern (Structural Pattern)
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Facade Pattern provides a unified interface to a set of interfaces in a subsystem. It defines a higher-level interface that makes the subsystem easier to use.
E.g.
I have a Call Details Record (CDR) to be processed by different systems. It is defined in the CDR class
using System;
using System.Collections.Generic;
using System.Text;
namespace FacadePattern
{
class […]
Design Pattern in .NET 101 - Decorator Pattern (Structural Pattern)
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Decorator Pattern attaches additional responsibilities to an object dynamically and provides a flexible alternative to subclassing for extending functionality.
E.g.
BaseMessage is defined
using System;
using System.Collections.Generic;
using System.Text;
namespace DecoratorPattern
{
abstract class BaseMessage
{
private string sender;
[…]
Design Pattern in .NET 101 - Proxy Pattern (Structural Pattern)
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Proxy Pattern provides a surrogate or placeholder for another object to control access to it.
E.g.
I defined a IGreeting interface
using System;
using System.Collections.Generic;
using System.Text;
namespace ProxyPattern
{
interface IGreeting
{
void SayHello();
}
}
Greeting implements IGreeting
using System;
using System.Collections.Generic;
using System.Text;
namespace ProxyPattern
{
[…]