FileStream fs = new FileStream(@"E:\noise\backup\beijing"+DateTime.Now.ToString()+".txt",FileMode.Create);
        StreamWriter writer = new StreamWriter(fs);
        writer.WriteLine("CASE");
        DateTime dt = DateTime.Now;
        string line2 = "opsfile.ops               7.0 " + dt.ToString("dd-MMM-yyyy", new System.Globalization.DateTimeFormatInfo()) + " " + dt.ToString("HH:mm:ss", new System.Globalization.DateTimeFormatInfo()) + "         0";
       writer.WriteLine(string.Format("{0,-10}", RunwayName1.Value) + string.Format("{0,10}", RunwayX1.Value) + string.Format("{0,10}", RunwayY1.Value) + string.Format("{0,10}", RunwayZ1.Value) + string.Format("{0,10}", RunwayX2.Value) + string.Format("{0,10}", RunwayY2.Value) + string.Format("{0,10}", RunwayZ2.Value));
       writer.WriteLine(string.Format("{0,20}", RunwayJingdu11.Value) + string.Format("{0,20}", RunwayWeidu11.Value) + string.Format("{0,20}", RunwayJingdu12.Value) + string.Format("{0,20}", RunwayWeidu12.Value) + string.Format("{0,3}", RunwayWidth1.Value));
        writer.Flush();
        fs.Close();提示说我的名称不符合规范,怎样修改啊