存储文本到一个文件里

 class Bu
    {
        public string fileName { get; set; } = "hello.txt";
        public string  filecontent { get; set; }
        public void WriteText2File()
        {            
            using (StreamWriter writer = File.CreateText(System.IO.Path.GetTempPath() + fileName))
            {
                writer.WriteLine(filecontent);
            }
            Console.ReadLine();
        }
    }