class someclass
{
       public someclass()
      {

       }
//my event
     public delegate void onTimelineHandler(object sender ,TimelineArgs e);
     public event onTimelineHandler OnTimelineRecieved;

        private void TimelineAsyncStart(string url)
        {
            Thread myAsyncer = new Thread(new ParameterizedThreadStart(doTimelineAsync));

            string[] objar = new string[] { url, username, password };
            myAsyncer.Start(objar);
            
        }

 private void doTimelineAsync(object objar)
        {

            string[] sa2 = (string[])objar;
            string url = sa2[0];
            string username = sa2[1];
            string password = sa2[2];

          //some stuff happens here

             TimelineArgs targs = new TimelineArgs(myobject);

          //here I need to call the event on the class that created    this thread, passing to that event the TImelineArgs object.

        }


]

using System.Threading;
 
namespace WindowsFormsApplication1
{
    public delegate void onTimelineHandler(object sender, TimelineArgs e);
    class SomeClass
    {
        public SomeClass() { }
        public event onTimelineHandler OnTimelineRecieved;
 
        public void TimelineAsyncStart(string url)
        {
            Thread myAsyncer = new Thread(new ParameterizedThreadStart(doTimelineAsync));
            string[] objar = new string[] { url, "username", "password" };
            myAsyncer.Start(objar);
        }
 
        private void doTimelineAsync(object objar)
        {
            string[] sa2 = (string[])objar;
            string url = sa2[0];
            string username = sa2[1];
            string password = sa2[2];
            object myobject = "411"; // just something to play with
            //some stuff happens here
            if( OnTimelineRecieved != null )
            {
                TimelineArgs targs = new TimelineArgs(myobject);
                OnTimelineRecieved(null, targs);
            }
        }
    }
 
    public class TimelineArgs
    {
        public object Something = null;
        public TimelineArgs(object something)
        {
            Something = something;
        }
    }
 
}

void cs_OnTimelineRecieved(object sender, TimelineArgs e)
        {
            if ( this.InvokeRequired )
            {
                onTimelineHandler d = new onTimelineHandler(cs_OnTimelineRecieved);
                this.Invoke(d, new object[] { sender, e });
            }
            else
            {
                string something = e.Something.ToString();
                MessageBox.Show(something);
            }
        }

start()
{
Func<Params, paramsreturnValue> method = Methodname;
IAsyncResult res = method.BeginInvoke(Params, Params, new AsyncCallback(methodthatCatchesEndInvoke), IDK object);
}

methodthatCatchesEndInvoke(IAsyncResult res)
{
ReturnValue answer = method.EndInvoke(res);
}

            if( OnTimelineRecieved != null )
            {
                TimelineArgs targs = new TimelineArgs(myobject);
                OnTimelineRecieved(null, targs);
            }

    public event EventHandler SomeEvent;
    private void SampleEvent()
    {
      var del = this.SomeEvent;
      if (del != null)
        del(this, new EventArgs());
    }

    void reader_OnLineReceived(object sender, TwitterLineReceivedArgs e)
    {
      this.Invoke(new MethodInvoker(
        delegate()
        {
          System.Threading.Interlocked.Increment(ref linesRead);
          textBox1.Text += e.Line;
          label1.Text = string.Format("Lines Read: {0:F0}", linesRead);
        }
      ));
    }

Thread myAsyncer = new Thread(new ParameterizedThreadStart(doTimelineAsync));

this.Invoke(new UpdateTextCallback(this.UpdateText), new object[] { e.TimeLine_Statuses });
 
then create a delegate and a method
 
        public delegate void UpdateTextCallback(statuses text);
 
        private void UpdateText(statuses text)
        {            statuses twitStatuses = text;
 
            foreach (statusesStatus stats in twitStatuses.status)
            {
                richTextBox1.Text = richTextBox1.Text + "\n" + stats.text + " - user: " + stats.user[0].name;
            }
        }

    public event EventHandler SomeEvent;
    private void SampleEvent()
    {
      var del = this.SomeEvent;
      if (del != null)
        del(this, new EventArgs());
    }