/// <summary>
/// Get successor or predecessor of this folder at the same level of the folders hierarchy
/// </summary>
/// <param name="backwards">
/// <see langword="true"/> for predecessor
/// <see langword="false"/> for successor
/// </param>
/// <returns>
/// <see langword="null"/> if none exist
/// </returns>
public IDataFolder GetNextSiblingInTree(bool backwards)
{
Check.RequireLambda(!IsVirtualRoot, () => new InvalidOperationException(StorageResources.VirtualRootInvalidOperation));
IDataFolder retval = ParentDataFolder.GetNextChild(this, backwards);
if (null == retval)
{
if (!ParentDataFolder.IsVirtualRoot)
{
for (
IDataFolder nst = ParentDataFolder.GetNextSiblingInTree(backwards);
nst != null && retval == null;
nst = nst.GetNextSiblingInTree(backwards))
{
retval = nst.GetFirstChildFolder(backwards);
}
}
}
return(retval);
}
