ICSharpCode.SharpZipLib.Zip.DiskArchiveStorage.GetTempFileName C# (CSharp) Method

        private static string GetTempFileName(string original, bool makeTempFile) {
            string result=null;

            if (original==null) {
                result=Path.GetTempFileName();
            } else {
                int counter=0;
                int suffixSeed=DateTime.Now.Second;

                while (result==null) {
                    counter+=1;
                    string newName=string.Format("{0}.{1}{2}.tmp", original, suffixSeed, counter);
                    if (!File.Exists(newName)) {
                        if (makeTempFile) {
                            try {
                                // Try and create the file.
                                using (FileStream stream=File.Create(newName)) {
                                }
                                result=newName;
                            } catch {
                                suffixSeed=DateTime.Now.Second;
                            }
                        } else {
                            result=newName;
                        }
                    }
                }
            }
            return result;
        }

        public override Stream ConvertTemporaryToFinal()
        {
            if (this.temporaryStream_ == null)
            {
                throw new ZipException("No temporary stream has been created");
            }
            Stream result       = null;
            string tempFileName = DiskArchiveStorage.GetTempFileName(this.fileName_, false);
            bool   flag         = false;

            try
            {
                this.temporaryStream_.Close();
                File.Move(this.fileName_, tempFileName);
                File.Move(this.temporaryName_, this.fileName_);
                flag = true;
                File.Delete(tempFileName);
                result = File.OpenRead(this.fileName_);
            }
            catch (Exception)
            {
                result = null;
                if (!flag)
                {
                    File.Move(tempFileName, this.fileName_);
                    File.Delete(this.temporaryName_);
                }
                throw;
            }
            return(result);
        }