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