C#

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();
}

if (nsStream.CanWrite)
     nsStream.Write(bUp, 0, bUp.Length);

nsStream.Flush();

int x = 0;

while (nsStream.DataAvailable && x < dataReadWait)
{
     x++;
     // Wait for data to be read
}

return true;

if (nsStream.CanRead)
     nsStream.Read(bDown, 0, bDown.Length);

nsStream.Flush();
return bDown;