Lazy-loading virtual proxy example

gistfile1.cs

public interface IMyService
{
    int GetData();
    string GetMoreData();
}

public class MyService : IMyService
{
    private int _data;
    private string _moreData;

    public MyService()
    {
        _data = 123;
        _moreData = "Some more data";
    }

    public int GetData()
    {
        return _data;
    }

    public string GetMoreData()
    {
        return _moreData;
    }
}
public class MyServiceProxy : IMyService
{
    private IMyService _service;

    private void InitializeServiceIfNecessary()
    {
        if (_service == null)
        {
            _service = new MyService();
        }
    }

    public int GetData()
    {
        this.InitializeServiceIfNecessary();

        return _service.GetData();
    }

    public string GetMoreData()
    {
        this.InitializeServiceIfNecessary();

        return _service.GetMoreData();
    }
}