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The Easiest Way to Learn Design Patterns in C#

Adapter: Implementation and Example

Explore how to implement the Adapter design pattern in C#. Understand how to create interfaces for European and British electric sockets and develop an adapter that allows these incompatible types to work together. This lesson demonstrates practical usage of the Adapter pattern to solve real-world compatibility challenges in software design.

We'll cover the following...

Implementing the Adapter pattern

In this example, we’ll use the concept of electric sockets. We’ll mimic the use of a socket adapter in the code.

Creating a standard application

We‘ll create a standard .NET console application. Then, we’ll add the IElectricSocket.cs file to it. The file will contain the following empty interface definition:

C#
namespace Adapter_Demo;
internal interface IElectricSocket
{
    
}

Implementing a socket plug interface

Then, we’ll create an interface representing a socket plug. For this, we’ll add the ISocketPlug.cs file with the following content:

C#
namespace Adapter_Demo;
internal interface ISocketPlug 
{
    void SelectSocket(IElectricSocket socket);
    void ConnectToSocket();
}

This interface contains two methods given on lines 5–6, in the code above:

  • The SelectSocket() method, which
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