BlueSky.SyntaxEditorWindow.IsValidFullPathFilename C# (CSharp) Метод

        private bool IsValidFullPathFilename(string path, bool filemustexist)
        {
            bool validDir, validFile;
            string message = string.Empty;
            string dir = Path.GetDirectoryName(path);
            string filename = Path.GetFileName(path);

            ///Check filename
            if (filemustexist && !File.Exists(path))// || (File.GetAttributes(path) & FileAttributes.Directory) == FileAttributes.Directory)
            {
                validFile = false;
                message = "Invalid Filename! " + filename;
            }
            else
                validFile = true;

            //// Check Directory path
            if (Directory.Exists(dir) || dir.Trim().Length == 0)// valid folder or blank if defaults are needed
            {
                validDir = true;
            }
            else
            {
                message = message + " Invalid Directory path! " + dir;
                validDir = false;
            }
            if (message.Trim().Length > 0)
            {
                logService.Warn(message);
            }
            return (validDir && validFile);
        }