C#文件操作

class FileHelper
    {
        public static string EMAIL_FILE = "emails.json";
        public static string QUARTZ_FILE = "quartz.json";
        public static string SMTP_FILE = "smtp.json";

        #region 保存文件到硬盘 writeFile
        /// <summary>
        /// 保存文件到硬盘
        /// </summary>
        /// <param name="path">文件的路径名称</param>
        /// <param name="content">文件内容</param>
        /// <returns>保存是否成功</returns>
        public static bool writeFile(string path, string content)
        {
            try
            {
                FileStream fs = new FileStream(path, FileMode.Create);
                StreamWriter sw = new StreamWriter(fs, Encoding.UTF8);
                sw.Write(content);
                sw.Flush();
                sw.Close();
                fs.Close();
            }
            catch (Exception)
            {
                return false;
            }

            return true;
        } 
        #endregion

        #region 保存文件到硬盘 writeFile
        /// <summary>
        /// 保存文件到硬盘
        /// </summary>
        /// <param name="path">文件的路径名称</param>
        /// <param name="content">文件内容</param>
        /// <returns>保存是否成功</returns>
        public static bool writeFileAppend(string path, string content)
        {
            try
            {
                FileStream fs = new FileStream(path, FileMode.Append);
                StreamWriter sw = new StreamWriter(fs, Encoding.UTF8);
                sw.Write(content);
                sw.Flush();
                sw.Close();
                fs.Close();
            }
            catch (Exception)
            {
                return false;
            }

            return true;
        }
        #endregion

        #region 读取文件 readFile
        /// <summary>
        /// 读取文件
        /// </summary>
        /// <param name="path">读取文件路径</param>
        /// <returns>返回读取的文件内容</returns>
        public static string readFile(string path)
        {
            StringBuilder sb = new StringBuilder();
            try
            {

                FileStream fs = new FileStream(path, FileMode.Open);
                StreamReader sr = new StreamReader(fs, false);
                string line = "";
                while ((line = sr.ReadLine()) != null)
                {
                    sb.AppendLine(line);
                }
                sr.Close();
                fs.Close();
            }
            catch (Exception)
            {
                return "";
            }

            return sb.ToString();
        } 
        #endregion
    }