private void quantity_ValueChanged(object sender, EventArgs e)
{
if (_rangingInformation != null)
{
var originalErrorLimit = _rangingInformation.Clone() as ErrorLimit;
if (originalErrorLimit != null)
{
ControlsToData();
edtErrorLimit.Text = _rangingInformation.ToString();
_rangingInformation = originalErrorLimit.Clone() as RangingInformation;
}
}
}