Response from MPD will be specific type. MpdDirectory and MpdFile created. Metadata for MpdFile still to be done.

LibMpc/Types/MpdDirectory.cs

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+using System.Collections.Generic;
+using System.Linq;
+
+namespace LibMpc.Types
+{
+    public class MpdDirectory
+    {
+        private readonly IList<MpdFile> _files = new List<MpdFile>();
+        private readonly IList<MpdDirectory> _subDirectories = new List<MpdDirectory>();
+
+        public MpdDirectory(string path)
+        {
+            path.CheckNotNull();
+
+            Path = path;
+
+            var name = path.Split('/').Last();
+            Name = string.IsNullOrEmpty(name) ? "root" : name;
+        }
+
+        public string Path { get; }
+        public string Name { get; }
+        public IEnumerable<MpdFile> Files => _files;
+        public IEnumerable<MpdDirectory> SubDirectories => _subDirectories;
+
+        internal void AddFile(string file)
+        {
+            var filePath = file.Split('/');
+            var name = filePath[filePath.Length - 1];
+
+            if (filePath.Length == 1)
+            {
+                _files.Add(new MpdFile(name));
+            }
+            else
+            {
+                var filePathWithoutCurrentDirectory = string.Join("/", filePath.Skip(1));
+                foreach (var subDirectory in _subDirectories)
+                {
+                    if (subDirectory.Path.Equals(filePath[0]))
+                    {
+                        subDirectory.AddFile(filePathWithoutCurrentDirectory);
+                    }
+                }
+            }
+        }
+
+        internal void AddDirectory(string directory)
+        {
+            var directoryPath = directory.Split('/');
+            var name = directoryPath[directoryPath.Length - 1];
+
+            if (directoryPath.Length == 1)
+            {
+                _subDirectories.Add(new MpdDirectory(name));
+            }
+            else
+            {
+                var directoryPathWithoutCurrentDirectory = string.Join("/", directoryPath.Skip(1));
+                foreach (var subDirectory in _subDirectories)
+                {
+                    if (subDirectory.Path.Equals(directoryPath[0]))
+                    {
+                        subDirectory.AddDirectory(directoryPathWithoutCurrentDirectory);
+                    }
+                }
+            }
+        }
+    }
+}

LibMpc/Types/MpdFile.cs

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+namespace LibMpc.Types
+{
+    public class MpdFileBuidler
+    {
+        private const string TagFile = "file";
+        private const string TagTime = "Time";
+        private const string TagArtist = "Artist";
+        private const string TagAlbum = "Album";
+        private const string TagTitle = "Title";
+        private const string TagTrack = "Track";
+        private const string TagName = "Name";
+        private const string TagGenre = "Genre";
+        private const string TagDate = "Date";
+        private const string TagComposer = "Composer";
+        private const string TagPerformer = "Performer";
+        private const string TagComment = "Comment";
+        private const string TagDisc = "Disc";
+        private const string TagPos = "Pos";
+        private const string TagId = "Id";
+
+        private MpdFile _mpdFile;
+
+        public bool IsInitialized => _mpdFile != null;
+
+        public MpdFileBuidler Init(string file)
+        {
+            _mpdFile = new MpdFile(file);
+            return this;
+        }
+
+        public MpdFileBuidler WithProperty(string tag, string value)
+        {
+            _mpdFile.CheckNotNull();
+
+            // TODO: Parse tag
+
+            return this;
+        }
+
+        public MpdFile Build()
+        {
+            return _mpdFile;
+        }
+    }
+
+
+    /// <summary>
+    /// The MpdFile class contains all meta data for a file of the MPD.
+    /// </summary>
+    public class MpdFile
+    {
+        public MpdFile(string file)
+        {
+            File = file;
+        }
+
+        public string File { get; }
+        public int Time { get; internal set;  } = -1;
+        public string Album { get; internal set; } = string.Empty;
+        public string Artist { get; internal set; } = string.Empty;
+        public string Title { get; internal set; } = string.Empty;
+        public string Track { get; internal set; } = string.Empty;
+        public string Name { get; internal set; } = string.Empty;
+        public string Genre { get; internal set; } = string.Empty;
+        public string Date { get; internal set; } = string.Empty;
+        public string Composer { get; internal set; } = string.Empty;
+        public string Performer { get; internal set; } = string.Empty;
+        public string Comment { get; internal set; } = string.Empty;
+        public int Disc { get; internal set; } = -1;
+        public int Pos { get; internal set; } = -1;
+        public int Id { get; internal set; } = -1;
+    }
+}

LibMpc/Types/MpdOutput.cs

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+namespace LibMpc.Types
+{
+    /// <summary>
+    /// The MpdOutput class contains all attributes of an output device of the MPD.
+    /// </summary>
+    public class MpdOutput
+    {
+        public MpdOutput(int id, string name, bool enabled)
+        {
+            name.CheckNotNull();
+
+            Id = id;
+            Name = name;
+            IsEnabled = enabled;
+        }
+
+        public int Id { get; }
+        public string Name { get; }
+        public bool IsEnabled { get; }
+    }
+}