C#

public class MyClass
{
public int MyInt {get; set;}
public Button MyBtn {get; set;}
}

for (int i = 0; i < 5; i++)
            {
                MyClass myClass = new MyClass();
                myClass.MyInt = i;
                myClass.MyBtn = new Button();
                myClass.MyBtn.Click += (s, e) =>
                {
                    //Is it possible to get the value of 'myClass.MyInt'
                    //in this event handler since 'myClass.MyBtn' belongs
                    //to the same object?
                };
            }

public class Details : List<Details.Detail>
{
    public delegate void _WorkComplete();
    public event _WorkComplete WorkComplete;

    public void AddDataSource(object value)
    {
        Thread worker = new Thread(new ParameterizedThreadStart(dowork));
        worker.Start(value);
    }

    private void dowork(object value)
    {
        ArrayList list = (ArrayList)value;
        foreach (Item item in list)
        {
            this.Add(new Detail { FIELD1 = item.Code1, FIELD2 = item.Code2 });
        }
        if (WorkComplete != null) WorkComplete();
    }

    public class Detail
    {
        private string field1;
        private string field2;

        public Detail()
        {
            field1 = string.Empty;
            field2 = string.Empty;
        }

        public string FIELD1
        {
            get { return field1; }
            set { field1 = value; }
        }

        public string FIELD2
        {
            get { return field2; }
            set { field2 = value; }
        }
    }
}

private Details details = new Details();

protected void Page_Load(object sender, EventArgs e)
{
    details.OnWorkComplete += new Details._WorkComplete(details_AddComplete);
    details.AddDataSource(source1);
    details.AddDataSource(source2);
}

void details_AddComplete()
{
    grid1.DataSource = details;
    grid1.DataBind();
}