C#读取文件中文到显示框乱码

 StreamReader sr = new StreamReader((System.IO.Stream)File.OpenRead(path), System.Text.Encoding.Default);

显示中文乱码

系统默认编码是Encoding.Default 改用utf-8

StreamReader sr = new StreamReader((System.IO.Stream)File.OpenRead(path), System.Text.Encoding.UTF8)