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SyncRoot Property

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

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

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

Syntax

'Declaration
Public Overridable ReadOnly Property SyncRoot As Object

public virtual Object SyncRoot { get; }

public:
virtual property Object^ SyncRoot {
    Object^ get ();
}

abstract SyncRoot : Object with get
override SyncRoot : Object with get

function get SyncRoot () : Object

Property Value

Type: System. . :: . .Object
An object that can be used to synchronize access to the ArrayList.

Implements

ICollection. . :: . .SyncRoot

Remarks

To create a synchronized version of the ArrayList, use the Synchronized method. However, derived classes can provide their own synchronized version of the ArrayList using the SyncRoot property. The synchronizing code must perform operations on the SyncRoot of the ArrayList, not directly on the ArrayList. 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 ArrayList object.

Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads can 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.

.NET Framework Security

See Also

Reference

ArrayList Class

System.Collections Namespace