Using Proxy Pattern in C#: Basic Information and Applications

The proxy design pattern is an effective part of object-oriented design and allows controlling access by using a representative instead of the real object. This is especially useful in cases where the cost or time of creating and managing objects is high. In a powerful object-oriented programming language like C#, the use of Proxy Patterns holds an important place in software architecture. In this article, you will learn how to use the Proxy Pattern with C#.

What is the Proxy Pattern?

The Proxy Pattern is a configuration used to control access to an object or to extend the functionality of an object. A proxy is typically an object that stands in for real objects instead of creating or referring to them. By using this pattern, we can perform control operations (such as authorization or caching) before creating the real object.

Implementing Proxy Pattern in C#

Implementing this pattern in C# is quite straightforward. Below is a simple example showing how to create and use a Proxy class:

Base Classes and Interfaces

public interface IService
{
    void Execute();
}

public class RealService : IService
{
    public void Execute()
    {
        Console.WriteLine("Real service executed.");
    }
}

Proxy Class

public class ProxyService : IService
{
    private RealService _realService;

    public void Execute()
    {
        // Authorization control can be done first.
        if (_realService == null)
        {
            _realService = new RealService();
        }
        Console.WriteLine("Service is being called through proxy...");
        _realService.Execute();
    }
}

Usage Example

You can review the following code snippet to use our Proxy class:

class Program
{
    static void Main(string[] args)
    {
        IService service = new ProxyService();
        service.Execute();
    }
}

In the example above, we create a ProxyService object in the Program class and call the Execute() method. This call actually creates a RealService object that represents a real service and runs its method.

Conclusion

Using the Proxy Pattern with C# offers an effective way to control object access. This pattern can make resources more efficient and make system management easier. In real-world application scenarios, the Proxy pattern offers a powerful solution for operations such as caching, data privacy, and security controls. By using this pattern in your projects, you can build more robust and manageable systems.