Windows apps
Collapse the table of content
Expand the table of content
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

SynchronizationAttribute Class


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Sets the synchronization value of the component. This class cannot be inherited.

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


[AttributeUsageAttribute(AttributeTargets.Class, Inherited = true)]
public sealed class SynchronizationAttribute : Attribute


Initializes a new instance of the SynchronizationAttribute class with the default SynchronizationOption.


Initializes a new instance of the SynchronizationAttribute class with the specified SynchronizationOption.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


Gets the current setting of the Value property.


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)


Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

Both transaction and just-in-time (JIT) activation enable synchronization automatically.

For more information about using attributes, see Extending Metadata Using Attributes.

Applying SynchronizationAttribute to a context-bound object results in the creation of a wait handle and auto reset event, which are not deterministically garbage collected. Therefore, you should not create a large number of context-bound objects marked with the SynchronizationAttribute within a short time period.

The following code example demonstrates the use of the SynchronizationAttribute type.

using System;
using System.EnterpriseServices;
using System.Reflection;

// References:
// System.EnterpriseServices

// This is equivalent to [Synchronization(SynchronizationOption.Required)].
public class SynchronizationAttribute_Ctor : ServicedComponent

public class SynchronizationAttribute_Ctor_SynchronizationOption : ServicedComponent

public class SynchronizationAttribute_Value : ServicedComponent
    public void ValueExample()
        // Get the SynchronizationAttribute applied to the class.
        SynchronizationAttribute attribute =

        // Display the value of the attribute's Value property.
        Console.WriteLine("SynchronizationAttribute.Value: {0}",

.NET Framework
Available since 1.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Return to top
© 2017 Microsoft