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ISourceBlock(TOutput).ReleaseReservation Method

.NET Framework 4.5

Called by a linked ITargetBlock(TInput) to release a previously reserved DataflowMessageHeader by this ISourceBlock(TOutput).

Namespace:  System.Threading.Tasks.Dataflow
Assembly:  System.Threading.Tasks.Dataflow (in System.Threading.Tasks.Dataflow.dll)

abstract ReleaseReservation : 
        messageHeader:DataflowMessageHeader * 
        target:ITargetBlock<'TOutput> -> unit

Parameters

messageHeader
Type: System.Threading.Tasks.Dataflow.DataflowMessageHeader

The DataflowMessageHeader of the reserved message being released.

target
Type: System.Threading.Tasks.Dataflow.ITargetBlock(TOutput)

The ITargetBlock(TInput) releasing the message it previously reserved.

ExceptionCondition
ArgumentException

The messageHeader is not valid.

ArgumentNullException

The target is a null reference (Nothing in Visual Basic).

InvalidOperationException

The target did not have the message reserved.

Only ITargetBlock(TInput) instances linked to this ISourceBlock(TOutput) instance may use ReleaseReservation, and it must only be used to release DataflowMessageHeader instances previously and successfully reserved by the target.

.NET Framework

Supported in: 4.5

Portable Class Library

Supported in: Portable Class Library
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