FastQuant.DataSeries.GetFirstKey C# (CSharp) Méthode

        private DataKey GetFirstKey()
        {
            var key = this.cache[0] = this.cache[0] ?? ReadKey(this.position1);
            key.number = 0;
            key.index1 = 0;
            key.index2 = key.count - 1;
            if (key.index2 < 0)
                key.index2 = 0;
            return key;
        }