Upgrading Your Code to WebDAV Client Library for .NET v1.2
IResource.IsCheckedOut, IResource.IsVersionControlled, IHierarchyItem.GetActiveLocks and IHierarchyItem.GetSupportedLock methods are now replaced with IResource.CheckedOut, IResource.VersionControlled, IHierarchyItem.ActiveLocks and IHierarchyItem.SupportedLock properties. While methods submitted requests to the server, new properties now return same info but obtained while opening item.
ResourceType enumeration renamed to ItemType.