C# 写文件

var path = "E:\\test.txt";
                    FileStream fs = new FileStream(path, FileMode.Create);
                    StreamWriter sw = new StreamWriter(fs);
                    //开始写入
                    sw.Write(item.DataId);
                    sw.Write(‘hello world!‘);
                    //清空缓冲区
                    sw.Flush();
                    //关闭流
                    sw.Close();
                    fs.Close();