/// <summary>Shifts node start, end and all child elements by the specified offset.</summary>
public override void Shift(int offset)
{
StartTag.Shift(offset);
if (EndTag != null)
{
EndTag.Shift(offset);
}
if (OrphanedEndTagsCollection != null)
{
OrphanedEndTagsCollection.Shift(offset);
}
VirtualEnd += offset;
for (int i = 0; i < Children.Count; i++)
{
Children[i].Shift(offset);
}
}