fCraft.BlockDB.Clear C# (CSharp) Method

        public void Clear()
        {
            IDisposable writeLockHandle = null;
            try {
                if ( !locker.IsWriteLockHeld ) {
                    writeLockHandle = locker.WriteLock();
                }

                CacheClear();
                if ( File.Exists( FileName ) ) {
                    File.Delete( FileName );
                }
            } finally {
                if ( writeLockHandle != null ) {
                    writeLockHandle.Dispose();
                }
            }
        }

 public void ChangeMap([NotNull] Map newMap)
 {
     if (newMap == null)
     {
         throw new ArgumentNullException("newMap");
     }
     MapChangedOn = DateTime.UtcNow;
     lock (SyncRoot)
     {
         World newWorld = new World(Name)
         {
             AccessSecurity = (SecurityController)AccessSecurity.Clone(),
             BuildSecurity  = (SecurityController)BuildSecurity.Clone(),
             IsHidden       = IsHidden,
             IsRealm        = IsRealm,
             BlockDB        = BlockDB,
             lastBackup     = lastBackup,
             BackupInterval = BackupInterval,
             IsLocked       = IsLocked,
             LockedBy       = LockedBy,
             UnlockedBy     = UnlockedBy,
             LockedDate     = LockedDate,
             UnlockedDate   = UnlockedDate,
             LoadedBy       = LoadedBy,
             LoadedOn       = LoadedOn,
             MapChangedBy   = MapChangedBy,
             MapChangedOn   = MapChangedOn,
             FogColor       = FogColor,
             CloudColor     = CloudColor,
             SkyColor       = SkyColor,
             EdgeLevel      = EdgeLevel,
             SideBlock      = SideBlock,
             EdgeBlock      = EdgeBlock,
             CloudColorCC   = CloudColorCC,
             SkyColorCC     = SkyColorCC,
             FogColorCC     = FogColorCC,
             sideLevel      = sideLevel,
             sideBlock      = sideBlock,
             edgeBlock      = edgeBlock,
             textureURL     = textureURL
         };
         newWorld.Map         = newMap;
         newWorld.NeverUnload = neverUnload;
         WorldManager.ReplaceWorld(this, newWorld);
         lock (BlockDB.SyncRoot) {
             BlockDB.Clear();
             BlockDB.World = newWorld;
         }
         foreach (Player player in Players)
         {
             player.JoinWorld(newWorld, WorldChangeReason.Rejoin);
         }
     }
 }