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Showing content from https://docs.microsoft.com/en-us/dotnet/api/system.data.linq.datacontext.objecttrackingenabled below:

DataContext.ObjectTrackingEnabled Property (System.Data.Linq) | Microsoft Learn

Gets or sets a value that indicates whether object tracking is enabled.

public:
 property bool ObjectTrackingEnabled { bool get(); void set(bool value); };

public bool ObjectTrackingEnabled { get; set; }

member this.ObjectTrackingEnabled : bool with get, set

Public Property ObjectTrackingEnabled As Boolean

true if the object tracking is enabled; otherwise, false. The default is true.

Setting this property to false improves performance at retrieval time, because there are fewer items to track.

An exception is thrown:

• If the property is set to false after a query has been executed.

  For more information, see the Valid Modes section in DataContext.

• If the property is set to false and SubmitChanges is called.

If ObjectTrackingEnabled is false, DeferredLoadingEnabled is ignored and treated as false. In this case, the DataContext is read-only.

If ObjectTrackingEnabled is true, DeferredLoadingEnabled is false. In this case, DataContext allows you to load an object graph by using LoadWith directives, but does not enable deferred loading.

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