This attribute on an entity type is used to specify the properties that determine changes in content.
[AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public sealed class ETagAttribute : Attribute
The ETagAttribute type exposes the following members.
Optimistic concurrency checks are enabled on a per type basis in WCF Data Services. For more information, see Making Changes to Data (WCF Data Services).
Any public static
in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.