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BitArray.SyncRoot Property

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Definition

Namespace:
System.Collections
Assembly:
System.Collections.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll
Source:
BitArray.cs
Source:
BitArray.cs
Source:
BitArray.cs

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

public:
 property System::Object ^ SyncRoot { System::Object ^ get(); };
public object SyncRoot { get; }
member this.SyncRoot : obj
Public ReadOnly Property SyncRoot As Object

Property Value

Object

An object that can be used to synchronize access to the BitArray.

Implements

SyncRoot

Examples

The following code example shows how to lock the collection using the SyncRoot during the entire enumeration.

BitArray^ myCollection = gcnew BitArray(64, true);
bool lockTaken = false;
try
{
    Monitor::Enter(myCollection->SyncRoot, lockTaken);
    for each (Object^ item in myCollection)
    {
        // Insert your code here.
    }
}
finally
{
    if (lockTaken)
    {
        Monitor::Exit(myCollection->SyncRoot);
    }
}

BitArray myCollection = new BitArray(64, true);
lock(myCollection.SyncRoot)
{
    foreach (object item in myCollection)
    {
        // Insert your code here.
    }
}

Dim myCollection As New BitArray(64, true)
SyncLock myCollection.SyncRoot
    For Each item In myCollection
        ' Insert your code here.
    Next item
End SyncLock

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

Remarks

Derived classes can provide their own synchronized version of the BitArray using the SyncRoot property. The synchronizing code must perform operations on the SyncRoot of the BitArray, not directly on the BitArray. 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 BitArray 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.

Applies to

See also