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DataServiceKeyAttribute Class

Denotes the key property or properties of an entity.

Namespace:  System.Data.Services.Common
Assembly:  System.Data.Services.Client (in System.Data.Services.Client.dll)

[AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = false)]
public sealed class DataServiceKeyAttribute : Attribute

You should only apply the DataServiceKeyAttribute attribute to a property that can be used to uniquely identify an instance of the entity type. This attribute is ignored when applied to a navigation property. For more information, see Reflection Provider (ADO.NET Data Services).


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5 SP1