C#

int i=0;
do
   {
   if (sublist[i].DeleteLine(new Point(e.X, e.Y)))  
        break;
   }  while (i++ < sublist.Count);

int i=0;
do { } while ( !sublist[i].DeleteLine(new Point(e.X, e.Y)) && (i++ < sublist.Count ));

int i=0;
do { } while ( !sublist[i].DeleteLine(new Point(e.X, e.Y)) && (i++ < sublist.Count ));

int i = 0;
do { 
if ( sublist[i].DeleteLine(new Point(e.X, e.Y) ) )
   break;

} while (i++ < sublist.Count);

for (int i=0; i<count; i++) {
    if (some test) {
        do whatever needs to be done to item i
        break;
    }
}

System.Drawing.Drawing2D.GraphicsPath gPath = new System.Drawing.Drawing2D.GraphicsPath();
System.Drawing.Rectangle formRectangle = this.Bounds;
gPath.AddEllipse(0, 0, formRectangle.Width, formRectangle.Height);
this.Region = new System.Drawing.Region(gPath);

private Point           _startDragPoint;
private System.Timers.Timer TimerMovePad;

this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.yourFormMouseUp);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.yourFormMouseMove);
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.yourFormMouseDown);

public void MovePadMouseDown(System.Windows.Forms.MouseEventArgs e)
{
    // Set the drag flag for the mousemove event
    _dragModeEnabled = true;

    // Record the start point for the slider movement
    _startDragPoint = new Point(e.X, e.Y);
}

public void MovePadMouseMove(System.Windows.Forms.MouseEventArgs e)
{
    if (_dragModeEnabled == false)
        return;

    MovePad(e);
}

public void MovePadMouseUp(System.Windows.Forms.MouseEventArgs e)
{
    if (_dragModeEnabled == false)
        return;

    // Reset the drag flag
    _dragModeEnabled = false;
    MovePad(e);
}

private void MovePad(System.Windows.Forms.MouseEventArgs e)
{
    if(TimerMovePad == null)
    {
        this.TimerMovePad = new System.Timers.Timer();
        this.TimerMovePad.Interval = 100;
        this.TimerMovePad.Elapsed +=new System.Timers.ElapsedEventHandler(TimerMovePad_Elapsed);
    }

    if (TimerMovePad.Enabled == false)
    {
        TimerMovePad.Enabled = true;
    }

    if(_movementok == true)
    {
        _movementok = false;

        //Hier wird die zurückgelegt strecke in Pixel ermittelt.
        int delta_x = e.X - _startDragPoint.X;
        int delta_y = e.Y - _startDragPoint.Y;

        //Hier wird die Position neu bestimmt
        this.Location = new Point((this.Location.X + delta_x), (this.Location.Y + delta_y));
    }
}

private void TimerMovePad_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
    TimerMovePad.Enabled = false;
    _movementok = true;
}

private void yourFormMouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
    MovePadMouseDown(e);
}

private void yourFormMouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
    MovePadMouseMove(e);
}

private void yourFormMouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
    MovePadMouseUp(e);
}