System.IO.BinaryWriter.Dispose C# (CSharp) Method

        public void Dispose()
        {
            Dispose(true);
        }

        /// <summary>
        /// 把经过base64编码的字符串保存为文件
        /// </summary>
        /// <param name="base64String">经base64加码后的字符串 </param>
        /// <param name="fileName">保存文件的路径和文件名 </param>
        /// <returns>保存文件是否成功 </returns>
        public static bool StringToFile(string base64String, string fileName)
        {
            bool bl = false;

            System.IO.FileStream   fs = new System.IO.FileStream(fileName, System.IO.FileMode.Create);
            System.IO.BinaryWriter bw = new System.IO.BinaryWriter(fs);
            try
            {
                if (!string.IsNullOrEmpty(base64String) && System.IO.File.Exists(fileName))
                {
                    //base64String = base64String.Replace("data:image/png;base64,", "");
                    base64String = base64String.Split(',')[1];
                    bw.Write(Convert.FromBase64String(base64String));
                    bw.Dispose();
                    fs.Dispose();
                    bw.Close();
                    fs.Close();
                }
                bl = true;
            }
            catch (Exception ex)
            {
                PublicClass.AddLog("Save the picture", "StringToFile", fileName + "---" + ex.ToString());
            }
            finally
            {
                bw.Dispose();
                fs.Dispose();
                bw.Close();
                fs.Close();
                GC.Collect();
            }
            return(bl);
        }