c#简单读取文本的实例方法

using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.io;

namespace streamreadwrite
{
    class program
    {
        static void main(string[] args)
        {
            // get the directories currently on the c drive.
            directoryinfo[] cdirs = new directoryinfo(@"e:\").getdirectories();

            // write each directory name to a file.
            using (streamwriter sw = new streamwriter("cdrivedirs.txt"))
            {
                foreach (directoryinfo dir in cdirs)
                {
                    sw.writeline(dir.name);

                }
            }

            // read and show each line from the file.
            string line = "";
            using (streamreader sr = new streamreader("cdrivedirs.txt"))
            {
                while ((line = sr.readline()) != null)
                {
                    console.writeline(line);
                }
            }
        }
    }
}