private static IDictionary <string, string> CreateAndSaveDefaultValues(
            EFConfigurationContext dbContext)
        {
            // Quotes (c)2005 Universal Pictures: Serenity
            // https://www.uphe.com/movies/serenity
            var configValues = new Dictionary <string, string>
            {
                { "quote1", "I aim to misbehave." },
                { "quote2", "I swallowed a bug." },
                { "quote3", "You can't stop the signal, Mal." }
            };

            dbContext.Values.AddRange(configValues
                                      .Select(kvp => new EFConfigurationValue
            {
                Id    = kvp.Key,
                Value = kvp.Value
            })
                                      .ToArray());

            dbContext.SaveChanges();

            return(configValues);
        }