public void RemoveParent(CollectionOfChild col)
{
if (this.Parent != col)
{
throw new Exception("Removing parent that isn't the parent");
}
this._Parent = null;
}
public void UpdateParent(CollectionOfChild col)
{
if (col.Contains(this))
{
this._Parent = col;
}
else
{
throw new Exception("Only collection can invoke this");
}
}