Gets or sets the value that indicates whether changes to the data context object are tracked.
Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
The property is only used when selecting data from a LINQ To SQL data context object.
When you are interacting with read-only data, setting the property to false improves performance because the data is not cached to determine if it has changed. However, it also disables deferred query execution. This property must be set to true if you want to use deferred query execution.