C#

delegate void action2();<br />
       private void button1_Click(object sender, EventArgs e)<br />
       {            <br />
           try<br />
           {<br />
               ClassLibrary1.Class1 obj = new ClassLibrary1.Class1 ();<br />
               action2 del = new action2 (obj.foo);<br />
               del.BeginInvoke( callback, del);<br />
           }<br />
           catch ( Exception ex )<br />
           {<br />
               MessageBox.Show (this,ex.Message);<br />
           }<br />
       }<br />
       private void callback(IAsyncResult a)<br />
       {<br />
           try<br />
           {<br />
               action2 a2 = (action2)a.AsyncState;<br />
               a2.EndInvoke (a);<br />
           }<br />
           catch (Exception ex)<br />
           {<br />
               MessageBox.Show (this, ex.Message);<br />
           }<br />
       }<br />

using System;<br />
using System.Collections.Generic;<br />
using System.Text;<br />
<br />
namespace ClassLibrary1 {<br />
    public class Class1 {<br />
        public void foo()<br />
        {<br />
            throw new Exception ("Why!!!");<br />
        }<br />
    }<br />
}<br />

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

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private delegate void SetButtonTextCallback(System.Windows.Forms.Button tBox, string text);


   private void SetButtonText(System.Windows.Forms.Button tBox, string text)
   {

       if (tBox.InvokeRequired)
       {
           SetButtonBoxCallback d = new SetButtonTextCallback(SetButtonText);
           this.Invoke(d, new object[] { tBox, text });
       }
       else
       {
           tBox.Text = text;
       }

   }