C# 文本读写

public class FileFunction
    {
        public static void SaveToTxT(string strPath, string strData)
        {
            using (FileStream fsWrite = new FileStream(strPath, FileMode.OpenOrCreate, FileAccess.Write))
            {
                byte[] buffer = Encoding.Default.GetBytes(strData);
                fsWrite.Position = fsWrite.Length;
                fsWrite.Write(buffer, 0, buffer.Length);
                fsWrite.Close();
            }
        }
        public static string LoadByTxT(string strPath)
        {
            string strRead = "";
            using(FileStream fsRead = new FileStream(strPath, FileMode.Open, FileAccess.Read))
            {
                byte[] buffer = new byte[fsRead.Length];
                fsRead.Position = 0;
                fsRead.Read(buffer, 0, buffer.Length);
                strRead = Encoding.Default.GetString(buffer);
                fsRead.Close();
            }
            return strRead;
        }      
    }

写：将string类型的数据通过默认的编码器转为byte数组，再通过文件流写入txt文件。

读：先通过文件流打开文件，再将其读入byte数组，之后采用默认编码器转化为string类型数据。