public List<string> options1 = new List<string>();
        public struct question
        {
            public string text;
            public List<string> options;
        }
        public List<question> questions;
string line;
            var reader = new System.IO.StreamReader("questions.txt");
            question ques = new question();
            while (reader.ReadLine()!=null)
            {
                line = reader.ReadLine();
                if (line[0]!='+' && line[0]!='-')
                {
                    ques.text = line;

                }
                else
                {
                    ques.options.Add(line);
                }
                if (line=="@")
                {
                    questions.Add(ques);
                }
            }