驗證如果將導覽屬性周遊至其他實體集，再周遊導覽屬性夥伴時，目的地將會是來源實體集。
命名空間： Microsoft.Data.Edm.Validation
組件： Microsoft.Data.Edm (在 Microsoft.Data.Edm.dll 中)
語法
'宣告
Public Shared ReadOnly EntitySetNavigationMappingMustBeBidirectional As ValidationRule(Of IEdmEntitySet)
'用途
Dim value As ValidationRule(Of IEdmEntitySet)
value = ValidationRules.EntitySetNavigationMappingMustBeBidirectional
public static readonly ValidationRule<IEdmEntitySet> EntitySetNavigationMappingMustBeBidirectional
public:
static initonly ValidationRule<IEdmEntitySet^>^ EntitySetNavigationMappingMustBeBidirectional
static val EntitySetNavigationMappingMustBeBidirectional: ValidationRule<IEdmEntitySet>
public static final var EntitySetNavigationMappingMustBeBidirectional : ValidationRule<IEdmEntitySet>