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ApplicationQueuingAttribute.MaxListenerThreads Property

Gets or sets the number of threads used to extract messages from the queue and activate the corresponding component.

Namespace:  System.EnterpriseServices
Assembly:  System.EnterpriseServices (in System.EnterpriseServices.dll)

public int MaxListenerThreads { get; set; }

Property Value

Type: System.Int32
The maximum number of threads to use for processing messages arriving in the queue. The default is zero.

The valid range for this property is 0 to 1000. The default is zero. For a newly created application, the setting is derived from the algorithm currently used for determining the default number of listener threads: 16 times the number of CPUs in the server.

For more information, see QcListenerMaxThreads in Applications (COM+).

The following code example gets and sets the value of an ApplicationQueuing attribute's MaxListenerThreads property.

        // This example code requires that an ApplicationQueuing attribute be
        // applied to the assembly, as shown below:
        // [assembly: ApplicationQueuing]

        // Get the ApplicationQueuingAttribute applied to the assembly.
        ApplicationQueuingAttribute attribute =

        // Display the current value of the attribute's MaxListenerThreads
        // property.
            "ApplicationQueuingAttribute.MaxListenerThreads: {0}",

        // Set the MaxListenerThreads property value of the attribute.
        attribute.MaxListenerThreads = 1;

        // Display the new value of the attribute's MaxListenerThreads
        // property.
            "ApplicationQueuingAttribute.MaxListenerThreads: {0}",

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.