CSharp08.Program.GetGarbageFileNames C# (CSharp) Метод

        static List<string> GetGarbageFileNames()
        {
            var fileNames = new List<string>();

            {
                // 整个文件夹的所有文件
                string[] envVals =
                {
                    "windir",
                    "userprofile",
                    "userprofile",
                    "userprofile",
                };
                string[] dirs =
                {
                    "temp",
                    "local Settings/temporary internet files",
                    "local Settings/temp",
                    "recent",
                };

                for (int i = 0; i < envVals.Length; ++i)
                {
                    string path = Environment.GetEnvironmentVariable(envVals[i]) + "/" + dirs[i];
                    var _fileNames = Directory.GetFiles(path, "*", SearchOption.AllDirectories);
                    fileNames.InsertRange(
                        fileNames.Count > 0 ? fileNames.Count - 1 : 0, _fileNames);
                }
            }

            {
                // 文件夹下的特定类型文件
                string[] envVals =
                {
                    "systemdrive",
                    "systemdrive",
                    "systemdrive",
                    "systemdrive",
                    "systemdrive",
                    "systemdrive",
                    "windir",
                };
                string[] dirs =
                {
                    "",
                    "",
                    "",
                    "",
                    "",
                    "",
                    "",
                };
                string[] exts =
                {
                    "*.tmp",
                    "*._mp",
                    "*.log",
                    "*.gid",
                    "*.chk",
                    "*.old",
                    "*.bak",
                };
                for (int i = 0; i < envVals.Length; ++i)
                {
                    string path = Environment.GetEnvironmentVariable(envVals[i]) + (dirs[i].Length > 0 ? "/" + dirs[i] + "/" : "");
                    var _fileNames = Directory.GetFiles(path, exts[i]);
                    fileNames.InsertRange(fileNames.Count > 0 ? fileNames.Count - 1 : 0, _fileNames);
                }
            }

            return fileNames;
        }