/// <summary>
/// Post all given items to the actionBlock and return a task of the completion.
/// </summary>
public static Task PostAllAndComplete <T>(this ITargetBlock <T> actionBlock, IEnumerable <T> inputs)
{
Contract.Requires(inputs != null);
foreach (T input in inputs)
{
actionBlock.PostOrThrow(input);
}
actionBlock.Complete();
return(actionBlock.Completion);
}