Illustrates how to configure an object using closures in C#

closure-conf.cs

class Program
{
    static void Main(string[] args)
    {
        var obj1 = new ToBeConfigured(with =>
        {
            with.UseB();
            with.SetParam("something");
        });

        Debug.Assert(obj1.Configuration.A == false);
        Debug.Assert(obj1.Configuration.B == true);
        Debug.Assert(obj1.Configuration.Param == "something");

        Console.ReadKey();
    }
}

class Configuration
{
    public void UseA()
    {
        A = true;
    }

    public void UseB()
    {
        B = true;
    }

    public void SetParam(string data)
    {
        Param = data;
    }

    public bool A { get; private set; }

    public bool B { get; private set; }

    public string Param { get; private set; }
}

class ToBeConfigured
{
    public ToBeConfigured(Action<Configuration> config)
    {
        var confInst  = new Configuration();
        config.Invoke(confInst);
        Configuration = confInst;
    }

    public Configuration Configuration { get; private set; }
}