private void HandleTabChanged(object sender, TabControlCancelEventArgs e)
{
if (e.Action != TabControlAction.Selecting)
{
return;
}
if (e.TabPage == _previousPage)
{
return;
}
EditView oldView = _views[_previousPage];
EditView newView = _views[e.TabPage];
byte[] data = oldView.GetRawData();
newView.SetRawData(data);
newView.Activate();
}