DataflowBlockOptions.EnsureOrdered Property

Definition

Namespace:

System.Threading.Tasks.Dataflow

Assembly:

System.Threading.Tasks.Dataflow.dll

Source:

DataflowBlockOptions.cs

Gets or sets a value that indicates whether ordered processing should be enforced on a block's handling of messages.

C#

public bool EnsureOrdered { get; set; }

Property Value

Boolean

true if ordered processing should be enforced; otherwise, false. The default value is true.

Remarks

By default, dataflow blocks enforce ordering on the processing of messages. This means that a block like System.Threading.Tasks.Dataflow.TransformBlock<TInput,TOutput> will ensure that messages are output in the same order they were input, even if parallelism is employed by the block, and the processing of a message N finishes after the processing of a subsequent message N+1 (the block will reorder the results to maintain the input ordering prior to making those results available to a consumer). Some blocks may allow this to be relaxed, however. Setting EnsureOrdered to false tells a block that it may relax this ordering if it's able to do so. This can be beneficial if making a processed result immediately available is more important than maintaining the input-to-output ordering.