private static MappingFragment FindConditionTypeMappingFragment( EntitySet tableSet, MappingFragment propertiesTypeMappingFragment, EntityTypeMapping conditionTypeMapping) { EntityType table = tableSet.ElementType; MappingFragment mappingFragment = conditionTypeMapping.MappingFragments.SingleOrDefault <MappingFragment>((Func <MappingFragment, bool>)(x => x.Table == table)); if (mappingFragment == null) { mappingFragment = EntityMappingOperations.CreateTypeMappingFragment(conditionTypeMapping, propertiesTypeMappingFragment, tableSet); mappingFragment.SetIsConditionOnlyFragment(true); if (propertiesTypeMappingFragment.GetDefaultDiscriminator() != null) { mappingFragment.SetDefaultDiscriminator(propertiesTypeMappingFragment.GetDefaultDiscriminator()); propertiesTypeMappingFragment.RemoveDefaultDiscriminatorAnnotation(); } } return(mappingFragment); }