HybridDictionary.SyncRoot Property
Gets an object that can be used to synchronize access to the HybridDictionary.
[Visual Basic] Public Overridable ReadOnly Property SyncRoot As Object Implements _ ICollection.SyncRoot [C#] public virtual object SyncRoot {get;} [C++] public: __property virtual Object* get_SyncRoot(); [JScript] public function get SyncRoot() : Object;
Property Value
An object that can be used to synchronize access to the HybridDictionary.
Implements
Remarks
Derived classes can provide their own synchronized version of the HybridDictionary using the SyncRoot property. The synchronizing code must perform operations on the SyncRoot of the HybridDictionary, not directly on the HybridDictionary. This ensures proper operation of collections that are derived from other objects. Specifically, it maintains proper synchronization with other threads that might be simultaneously modifying the HybridDictionary object.
Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads could still modify the collection, which causes the enumerator to throw an exception. To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.
[Visual Basic, C#] The following code example shows how to lock the collection using the SyncRoot during the entire enumeration:
[C#] HybridDictionary myCollection = new HybridDictionary(); lock( myCollection.SyncRoot ) { foreach ( Object item in myCollection ) { // Insert your code here. } } [Visual Basic] Dim myCollection As New HybridDictionary() Dim item As Object SyncLock myCollection.SyncRoot For Each item In myCollection ' Insert your code here. Next item End SyncLock
Requirements
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework
See Also
HybridDictionary Class | HybridDictionary Members | System.Collections.Specialized Namespace | IsSynchronized