protected ObservableTask(ITaskCompletionObserver observer)
 {
     _observer = observer;
 }
 public ReadFileChunkTask(FileChunk fileChunk, ITaskCompletionObserver fileConverter)
     : base(fileConverter)
 {
     _fileChunk = fileChunk;
 }
 public ReadFileChunkTask(FileChunk fileChunk, ITaskCompletionObserver fileConverter)
     : base(fileConverter)
 {
     _fileChunk = fileChunk;
 }
 public FileAssembleTask(FileChunk fileChunk, ITaskCompletionObserver observer)
     : base(observer)
 {
     _fileChunk = fileChunk;
 }