如何将整个HTML/XHTML文件以单个字符串的形式写入?

string html = File.ReadAllText(@"C:\myhtmlfiles\index.html");

File.WriteAllText(@"c:\someotherfile.html", html);

当然没问题。 string foo = file.ReadToEnd() .

string readPath= "D:\\Read.html";
string writePath= "D:\\write.html";

StreamReader sr = new StreamReader(readPath);
string html = sr.ReadToEnd();

StreamWriter sw = new StreamWriter(writePath);
sw.WriteLine(html);

或

 string path = "D:\\Read.html";
 string path1 = "D:\\write.html";

 html=ReadAllText(path);
 File.WriteAllText(path1, html);