diff --git a/minisqlquery-master/src/MiniSqlQuery.Core/MostRecentFilesService.cs b/minisqlquery-master/src/MiniSqlQuery.Core/MostRecentFilesService.cs
new file mode 100644
index 0000000..dedcddb
--- /dev/null
+++ b/minisqlquery-master/src/MiniSqlQuery.Core/MostRecentFilesService.cs
@@ -0,0 +1,83 @@
+#region License
+
+// Copyright 2005-2019 Paul Kohler (https://github.com/paulkohler/minisqlquery). All rights reserved.
+// This source code is made available under the terms of the GNU Lesser General Public License v3.0
+// https://github.com/paulkohler/minisqlquery/blob/master/LICENSE
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+
+namespace MiniSqlQuery.Core
+{
+ public class MostRecentFilesService : IMostRecentFilesService
+ {
+ private readonly List<string> _filenames;
+
+ public MostRecentFilesService()
+ {
+ _filenames = new List<string>();
+ }
+
+ public event EventHandler<MostRecentFilesChangedEventArgs> MostRecentFilesChanged;
+
+ public IList<string> Filenames
+ {
+ get { return _filenames; }
+ }
+
+ public void OnMostRecentFilesChanged(MostRecentFilesChangedEventArgs e)
+ {
+ var handler = MostRecentFilesChanged;
+ if (handler != null)
+ {
+ handler(this, e);
+ }
+ }
+
+ public void Register(string filename)
+ {
+ if (!_filenames.Contains(filename))
+ {
+ _filenames.Insert(0, filename);
+ }
+ else
+ {
+ // move to top of list
+ if (_filenames.Count > 1)
+ {
+ _filenames.Remove(filename);
+ _filenames.Insert(0, filename);
+ }
+ }
+
+ // enure the list is capped
+ while (_filenames.Count > MaxCommands)
+ {
+ _filenames.RemoveAt(_filenames.Count - 1);
+ }
+
+ NotifyListenersOfChange();
+ }
+
+ public void Remove(string filename)
+ {
+ if (_filenames.Contains(filename))
+ {
+ _filenames.Remove(filename);
+ }
+ NotifyListenersOfChange();
+ }
+
+ public int MaxCommands
+ {
+ get { return 10; }
+ }
+
+ protected void NotifyListenersOfChange()
+ {
+ OnMostRecentFilesChanged(new MostRecentFilesChangedEventArgs(_filenames));
+ }
+ }
+}
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