C#

byte[] arr1 = new byte[] {1,2,3,4};
byte[] arr2 = new byte[] {9,8,7,6};
byte[] arrFin;

using (MemoryStream ms = new MemoryStream())
{
    ms.Write(arr1, 0, arr1.Length);
    ms.Write(arr2, 0, arr2.Length);

    arrFin = ms.ToArray();
}

<br />
private Form Frm;<br />
		private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			if(Frm!=null)<br />
			{<br />
				Frm.TopMost=true;<br />
				Frm.Activate();<br />
				<br />
			}<br />
			else<br />
			{<br />
				Frm=new Form();<br />
				Frm.TopMost=true;<br />
				Frm.Show();<br />
			}<br />
		 <br />
		}

public void Example()
{
        try
        {
                //Your Executable code here
        }
        catch(Exceptopn){}  //Catches all Excetions
        catch(Excetion e)   //Catches all Exceptions also
        {
                //What do you want to do when an excetion has happend
                Console.WriteLine(e.ToString()); //Helps to Debug and find
                                                 //the specific Excetion
        }
        /*
        finaly
        {
                //Code that will always Execute even with Excetion or not
                //The finaly block is optional and is not needed
        }
        */
}

<br />
#region Constructor<br />
private Game(Control cTarget)<br />
{<br />
  try<br />
  {	<br />
    this.target           = cTarget;<br />
    this.target.GotFocus += new System.EventHandler(this.Restore);<br />
		<br />
    this.graphics = new GraphicsHandler(this.target);<br />
    this.sounds   = new SoundHandler(this.target);<br />
    this.keyboard = new InputHandler(this.target);<br />
<br />
    this.presentState    = new GameState();<br />
    this.previousState   = new GameState();<br />
    this.presentData     = new GameData();<br />
    this.presentDataTemp = this.presentData.DeSerialize();<br />
<br />
    this.physics = new GamePhysics();<br />
<br />
    this.InitGame();<br />
<br />
    Timer.Init();<br />
  }<br />
  catch(Exception e)<br />
  {<br />
    MessageBox.Show("ERROR WHILE INITIALIZING GAME " + e.ToString());<br />
    return;<br />
  }<br />
<br />
  this.presentState  = GameState.Initialized;<br />
  this.previousState = GameState.Initialized;<br />
<br />
  this.GameLoop();<br />
}<br />
#endregion<br />