struct

internal struct Train
    {
        public string name;
        public int number;
        public string data;
        public Train(string name, int number, string data)
        {
            this.name = name;
            this.number = number;
            this.data = data;
        }

        public override string ToString()
        {
            string str = string.Format("{0}\t{1}\t{2}", this.number, this.name, this.data);
            return str;
        }
    }