gistfile1.cs

using (var bucket = Cluster.OpenBucket("default"))
{
  var removeTasks = items.Select(item => bucket.GetAsync<int>(item.Key)).ToList();
  var insertTasks = items.Select(item => bucket.GetAsync<int>(item.Key)).ToList();
  var getTasks = items.Select(item => bucket.GetAsync<int>(item.Key)).ToList();

  var removeResults = await Task.WhenAll(removeTasks).ConfigureAwait(false);
  var insertResults = await Task.WhenAll(insertTasks).ConfigureAwait(false);
  var getResults = await Task.WhenAll(getTasks).ConfigureAwait(false);

  foreach (var result in removeResults)
  {
      Console.WriteLine("{0} {1}", result.Value, result.Message);
  }
  foreach (var result in insertResults)
  {
      Console.WriteLine("{0} {1}", result.Value, result.Message);
  }
  foreach (var result in getResults)
  {
      Console.WriteLine("{0} {1}", result.Value, result.Message);
  }
}