public async Task <IEnumerable <SeriesModel> > GetAllAsync(int?LanguageId = null)
        {
            await Task.Delay(1);

            var data = new SeriesModel[] {
                //English
                new SeriesModel()
                {
                    Id = 1, LanguageId = 1, SeriesColor = "#C4262E", Name = "1000 Series"
                },
                new SeriesModel()
                {
                    Id = 2, LanguageId = 1, SeriesColor = "#004B8D", Name = "2000 Series"
                },
                new SeriesModel()
                {
                    Id = 3, LanguageId = 1, SeriesColor = "#6AC28A", Name = "3000 Series"
                },
                new SeriesModel()
                {
                    Id = 4, LanguageId = 1, SeriesColor = "#FF6D22", Name = "4000 Series"
                },
                new SeriesModel()
                {
                    Id = 5, LanguageId = 1, SeriesColor = "#C4262E", Name = "5000 Series"
                },
                new SeriesModel()
                {
                    Id = 6, LanguageId = 1, SeriesColor = "#ADAFAF", Name = "6000 Series"
                },
                new SeriesModel()
                {
                    Id = 7, LanguageId = 1, SeriesColor = "#ADAFAF", Name = "Other Products"
                },
                new SeriesModel()
                {
                    Id = 8, LanguageId = 1, SeriesColor = "#AA9C8F", Name = "Belestra"
                },
                new SeriesModel()
                {
                    Id = 9, LanguageId = 1, SeriesColor = "#ADAFAF", Name = "7000 Series"
                },

                //Spanish
                new SeriesModel()
                {
                    Id = 1, LanguageId = 3, SeriesColor = "#C4262E", Name = "1000 Serie"
                },
                new SeriesModel()
                {
                    Id = 2, LanguageId = 3, SeriesColor = "#004B8D", Name = "2000 Serie"
                },
                new SeriesModel()
                {
                    Id = 3, LanguageId = 3, SeriesColor = "#6AC28A", Name = "3000 Serie"
                },
                new SeriesModel()
                {
                    Id = 4, LanguageId = 3, SeriesColor = "#FF6D22", Name = "4000 Serie"
                },
                new SeriesModel()
                {
                    Id = 5, LanguageId = 3, SeriesColor = "#C4262E", Name = "5000 Serie"
                },
                new SeriesModel()
                {
                    Id = 6, LanguageId = 3, SeriesColor = "#ADAFAF", Name = "6000 Serie"
                },
                new SeriesModel()
                {
                    Id = 7, LanguageId = 3, SeriesColor = "#ADAFAF", Name = "7000 Serie"
                },
                new SeriesModel()
                {
                    Id = 8, LanguageId = 3, SeriesColor = "#AA9C8F", Name = "8000 Serie"
                },

                //French
                new SeriesModel()
                {
                    Id = 1, LanguageId = 2, Name = "1000 Série"
                },
                new SeriesModel()
                {
                    Id = 2, LanguageId = 2, Name = "2000 Série"
                },
                new SeriesModel()
                {
                    Id = 3, LanguageId = 2, Name = "3000 Série"
                },
                new SeriesModel()
                {
                    Id = 4, LanguageId = 2, Name = "4000 Série"
                },
                new SeriesModel()
                {
                    Id = 5, LanguageId = 2, Name = "5000 Série"
                },
                new SeriesModel()
                {
                    Id = 6, LanguageId = 2, Name = "6000 Série"
                },
                new SeriesModel()
                {
                    Id = 7, LanguageId = 2, Name = "7000 Série"
                },
                new SeriesModel()
                {
                    Id = 8, LanguageId = 2, Name = "8000 Série"
                },

                //Rusian
                new SeriesModel()
                {
                    Id = 1, LanguageId = 7, Name = "1000 Серия"
                },
                new SeriesModel()
                {
                    Id = 2, LanguageId = 7, Name = "2000 Серия"
                },
                new SeriesModel()
                {
                    Id = 3, LanguageId = 7, Name = "3000 Серия"
                },
                new SeriesModel()
                {
                    Id = 4, LanguageId = 7, Name = "4000 Серия"
                },
                new SeriesModel()
                {
                    Id = 5, LanguageId = 7, Name = "5000 Серия"
                },
                new SeriesModel()
                {
                    Id = 6, LanguageId = 7, Name = "6000 Серия"
                },
                new SeriesModel()
                {
                    Id = 7, LanguageId = 7, Name = "7000 Серия"
                },
                new SeriesModel()
                {
                    Id = 8, LanguageId = 7, Name = "8000 Серия"
                },
            };

            return(LanguageId != null?data.Where(f => f.LanguageId == LanguageId) : data);
        }