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SortedList<TKey, TValue>.ICollection.SyncRoot Property

Gets an object that can be used to synchronize access to the ICollection.

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

Object ICollection.SyncRoot { get; }

Property Value

Type: System.Object
An object that can be used to synchronize access to the ICollection. In the default implementation of SortedList<TKey, TValue>, this property always returns the current instance.

Implements

ICollection.SyncRoot

Default implementations of collections in System.Collections.Generic are not synchronized.

Enumerating through a collection is intrinsically not a thread-safe procedure. To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.

The SyncRoot property returns an object that can be used to synchronize access to the ICollection. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the SyncRoot property for C#, C++, and Visual Basic.

ICollection ic = ...;
lock (ic.SyncRoot) {
   // Access the collection.
}

Retrieving the value of this property is an O(1) operation.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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