public ForeignKey(Microsoft.EntityFrameworkCore.Metadata.IForeignKey foreignKey, EntityType entityType)
{
DeclaringEntityType = entityType.Model.FindEntityType(foreignKey.DeclaringEntityType.Name);
Properties = foreignKey.Properties.Select(p => DeclaringEntityType.FindProperty(p.Name)).ToList();
PrincipalEntityType = entityType.Model.FindEntityType(foreignKey.PrincipalEntityType.Name);
PrincipalKey = new Key(foreignKey.PrincipalKey, PrincipalEntityType);
}