string path = @"D:\a.txt";
System.IO.StreamWriter swOut = new System.IO.StreamWriter(path, false, System.Text.Encoding.Default);
swOut.WriteLine(strA);
swOut.Flush();
swOut.Close();
System.IO.StreamWriter,布布扣,bubuko.com
原文：http://www.cnblogs.com/viviancc/p/3820136.html