错误是D:\Training\ddd\Form1.cs(107): No overload for method 'File' takes '1' arguments,这不已经说得很清楚了
旧版的file 已经被改为 fileinfo,file 对象保留支持静态 io 操作FileInfo f = new FileInfo(@"D:\FileSystem\CheapISBN.ini"); StreamReader strm = f.OpenText();
The class System.IO.File only exposes static methods. You want to Your code should be: StreamReader strm = File.OpenText(@"D:\FileSystem\CheapISBN.ini");
StreamReader strm = f.OpenText();
Your code should be:
StreamReader strm = File.OpenText(@"D:\FileSystem\CheapISBN.ini");