private void OnVisible(object sender, EventArgs e)
{
if ((_ribbonRichTextBox != null) && (_ribbonRichTextBox.Ribbon != null))
{
PropertyDescriptor propertyVisible = TypeDescriptor.GetProperties(_ribbonRichTextBox)["Visible"];
bool oldValue = (bool)propertyVisible.GetValue(_ribbonRichTextBox);
bool newValue = !oldValue;
_changeService.OnComponentChanged(_ribbonRichTextBox, null, oldValue, newValue);
propertyVisible.SetValue(_ribbonRichTextBox, newValue);
}
}