DBreeze.Scheme.RenameTableInternal C# (CSharp) Method

        private bool RenameTableInternal(string oldUserTableName, string newUserTableName)
        {
            this.DeleteTable(newUserTableName);

            _sync_openTablesHolder.EnterWriteLock();
            try
            {
                string oldTableName = GetUserTableNameAsString(oldUserTableName);
                string newTableName = GetUserTableNameAsString(newUserTableName);

                OpenTable ot = null;

                string alternativeTableLocation = String.Empty;
                bool inMemory = false;

                _openTablesHolder.TryGetValue(oldTableName, out ot);

                if (CheckAlternativeTableLocationsIntersections(oldUserTableName, out alternativeTableLocation))
                {
                    if (alternativeTableLocation == String.Empty)
                    {
                        //In-Memory Table
                        inMemory = true;
                    }
                    else
                    {
                        if (ot != null)
                        {
                            return false;       //Other threads are working with this table

                        }
                    }
                }
                else
                {
                    if (Engine.Configuration.Storage == DBreezeConfiguration.eStorage.MEMORY)
                    {
                        //In-Memory Table
                        inMemory = true;
                    }
                    else
                    {
                        if (ot != null)
                        {
                            return false;       //Other threads are working with this table

                        }
                    }
                }

                //Changing key in Schema db

                byte[] btOldTableName = GetUserTableNameAsByte(oldUserTableName);
                byte[] btNewTableName = GetUserTableNameAsByte(newUserTableName);

                LTrie.ChangeKey(ref btOldTableName, ref btNewTableName);
                LTrie.Commit();

                this.cachedTableNames.Remove(oldTableName);

                if (inMemory && ot != null)
                {
                    //Changing reference for in-memory table,
                    _openTablesHolder.Add(newTableName, ot);
                    _openTablesHolder.Remove(oldTableName);
                }

            }
            catch (System.Exception ex)
            {
                DBreezeException.Throw(DBreezeException.eDBreezeExceptions.SCHEME_TABLE_RENAME_FAILED, oldUserTableName, ex);
            }
            finally
            {
                _sync_openTablesHolder.ExitWriteLock();
            }

            return true;
        }