C#

protected void UpdateControls()
{
    this.SuspendLayout();

    int LastTop = this.AutoScrollPosition.Y;
    foreach (Control ic in _controls)
    {
        ic.Top = LastTop;
        LastTop = ic.Bottom + 5;
    }

    this.ResumeLayout(true);

    if (this.Width != this.NeededWidth)
    {
        this.Width = NeededWidth;
    }
}

public int NeededWidth
{
    get
    {
        if (this.VScroll)
            return _MaxWidth + 17;
        else
            return _MaxWidth;
    }
}

    _ItemsContainer = new MyControl();
    _ItemsContainer.SizeChanged += new EventHandler(_ItemsContainer_SizeChanged);
...
void _ItemsContainer_SizeChanged(object sender, EventArgs e)
{
    _ItemsContainer.Width = _ItemsContainer.NeededWidth;
}

byte[] messageheader;
messageheader= new byte[10];
messageheader[0] = 0x16;
messageheader[1] = 0x01;
messageheader= BitConverter.GetBytes(01); // this must be divided into two bytes within the array
messagehd[3] = 02;
messageheader[4] = 00;
messageheader[5] = (byte)(message.Length);
serialPort1.Write(messageheader, 0, messageheader.Length);

<br />
Implementation:<br />
1.	I bind the tree view with all subfolders on the load time.<br />
2.	The list view shows the files and folders of each selected node in the tree.<br />
3.	When a node or list item checked or unchecked, all its sub-items has to get checked or unchecked.<br />
<br />
Issue faced:<br />
1.	In case of a large folder (with large no. of Subfolders and files), it takes long time for loading the tree (to bind all these sub-folders and files to tree)<br />
2.	If I go for an implementation of binding only two levels to the tree node each time (on load and on node click), issue occurs when I uncheck a node or list item. Only the sub items up to 2 level gets unchecked.<br />
3.	Check- Uncheck for large subfolders too takes long time.<br />
<br />