this code snippet is implementation of adapter design pattern with C#

adapterDesignPattern.cs

// Target or Wrapper
public interface IPostOperation
{
    void AddPost(string head);
}

// util operation class
public class PostOperation
    :IPostOperation
{

    public void AddPost(string head)
    {
        Console.WriteLine(head);
    }
}

// client
public class PostRepository
{
    public PostRepository(IPostOperation postOperation)
    {
        this._postOperation = postOperation;
    }

    public PostRepository()
    {
        this._postOperation = new PostOperation();
    }

    private readonly IPostOperation _postOperation;


    public void AddPost(string head)
    {
        this._postOperation.AddPost(head);
    }
}

//adaptee
public class ImageService
{
    public void AddImage(string head) 
    {
        Console.WriteLine("Video : {0}", head);
    }   
}

// adapter
public class ImageAdapter 
    :IPostOperation
{
    public ImageAdapter()
    {
        this._imageService = new ImageService();
    }

    public ImageService _imageService;

    public void AddPost(string head)
    {
        _imageService.AddImage(head);
    }
}