NetIde.Project.NiHierarchy.Reposition C# (CSharp) Méthode

        private void Reposition(NiHierarchy item)
        {
            RemoveFromChildren(item);
            AddToChildren(item);
        }

        public HResult SetProperty(int property, object value)
        {
            try
            {
                try
                {
                    if (property < 0)
                    {
                        switch ((NiHierarchyProperty)property)
                        {
                        case NiHierarchyProperty.FirstChild:
                        case NiHierarchyProperty.NextSibling:
                            throw new ArgumentOutOfRangeException("property", NeutralResources.CannotSetProperty);

                        case NiHierarchyProperty.Parent:
                            if (value != null && !(value is NiHierarchy))
                            {
                                throw new ArgumentOutOfRangeException("value", NeutralResources.ParentMustBeHierarchy);
                            }

                            return(ProcessParentChange((NiHierarchy)value));

                        case NiHierarchyProperty.Image:
                        case NiHierarchyProperty.OverlayImage:
                            if (value != null && !(value is IResource))
                            {
                                throw new ArgumentOutOfRangeException("value", NeutralResources.InvalidPropertyType);
                            }
                            break;

                        case NiHierarchyProperty.ItemType:
                            if (value != null && !(value is NiHierarchyType))
                            {
                                throw new ArgumentOutOfRangeException("value", NeutralResources.InvalidPropertyType);
                            }
                            break;

                        case NiHierarchyProperty.OwnerType:
                            if (value != null && !(value is Guid))
                            {
                                throw new ArgumentOutOfRangeException("value", NeutralResources.InvalidPropertyType);
                            }
                            break;

                        case NiHierarchyProperty.Name:
                            if (value != null && !(value is string))
                            {
                                throw new ArgumentOutOfRangeException("value", NeutralResources.InvalidPropertyType);
                            }

                            string oldName = _name;
                            _name = (string)value;

                            if (
                                _parent != null &&
                                !String.Equals(_name, oldName, NameComparison)
                                )
                            {
                                _parent.Reposition(this);
                            }
                            return(HResult.OK);

                        case NiHierarchyProperty.SortPriority:
                            if (value != null && !(value is int))
                            {
                                throw new ArgumentOutOfRangeException("value", NeutralResources.InvalidPropertyType);
                            }

                            var oldSortPriority = _sortPriority;
                            _sortPriority = (int?)value;

                            if (
                                _parent != null &&
                                _sortPriority.GetValueOrDefault() != oldSortPriority.GetValueOrDefault()
                                )
                            {
                                _parent.Reposition(this);
                            }
                            return(HResult.OK);

                        default:
                            throw new ArgumentOutOfRangeException("property", NeutralResources.UnknownProperty);
                        }
                    }

                    if (value == null)
                    {
                        _properties.Remove(property);
                    }
                    else
                    {
                        _properties[property] = value;
                    }
                }
                finally
                {
                    _connectionPoint.ForAll(p => p.OnPropertyChanged(this, property));
                }

                return(HResult.OK);
            }
            catch (Exception ex)
            {
                return(ErrorUtil.GetHResult(ex));
            }
        }