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AssociationAttribute Class

Specifies that an entity member represents a data relationship, such as a foreign key relationship.

System.Object
  System.Attribute
    System.ComponentModel.DataAnnotations.AssociationAttribute

Namespace:  System.ComponentModel.DataAnnotations
Assembly:  System.ComponentModel.DataAnnotations (in System.ComponentModel.DataAnnotations.dll)

[AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field, AllowMultiple = false, 
	Inherited = true)]
public sealed class AssociationAttribute : Attribute

The AssociationAttribute type exposes the following members.

  NameDescription
Public methodAssociationAttributeInitializes a new instance of the AssociationAttribute class.
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  NameDescription
Public propertyIsForeignKeyGets or sets the member as the foreign key in an association that represents a data relationship.
Public propertyNameGets the name used to identify the association.
Public propertyOtherKeyGets a comma-separated list of the property names of the key values on the other side of the association.
Public propertyOtherKeyMembersGets the collection of individual key values specified in the OtherKey property.
Public propertyThisKeyGets a comma-separated list of property names of the key values on this side of the association.
Public propertyThisKeyMembersGets the collection of individual key values specified in the ThisKey property.
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  NameDescription
Public methodEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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You apply the AssociationAttribute attribute to the property that represents the data relationship. The property that represents the relationship is usually a collection of objects representing the related class. When applying the attribute, you assign a name for the relationship and the keys associated on both sides of the relationship. For bidirectional associations, the name must be the same on both sides of the association.

When you apply an AssociationAttribute to a member in a WCF RIA Services solution, you must define the same number of keys on both sides of the relationship. If you do not provide the same number of keys to both sides of the relationship, you will receive an error when building the solution.

Silverlight

Supported in: 5, 4, 3

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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

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