BlockingCollection<T>.TryAdd Method (T, TimeSpan)

.NET Framework (current version)

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Tries to add the specified item to the BlockingCollection<T>.

Namespace:   System.Collections.Concurrent
Assembly:  System (in System.dll)

public bool TryAdd(
	T item,
	TimeSpan timeout


Type: T

The item to be added to the collection.

Type: System.TimeSpan

A TimeSpan that represents the number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely.

Return Value

Type: System.Boolean

true if the item could be added to the collection within the specified time span; otherwise, false.

Exception Condition

The BlockingCollection<T> has been disposed.


timeout is a negative number other than -1 milliseconds, which represents an infinite time-out -or- timeout is greater than MaxValue.


The BlockingCollection<T> has been marked as complete with regards to additions.


The underlying collection didn't accept the item.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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