diff --git a/src/StructuredLogViewer.Avalonia/FileTypes.cs b/src/StructuredLogViewer.Avalonia/FileTypes.cs
index 5ba036bdd..874ddba27 100644
--- a/src/StructuredLogViewer.Avalonia/FileTypes.cs
+++ b/src/StructuredLogViewer.Avalonia/FileTypes.cs
@@ -33,7 +33,7 @@ public class FileTypes
     public static FilePickerFileType Sln { get; } =
         new("Solution File")
         {
-            Patterns = new[] { "*.sln", "*.slnf" },
+            Patterns = new[] { "*.sln", "*.slnf", "*.slnx"},
             MimeTypes = new[] { "text/plain" },
             AppleUniformTypeIdentifiers = new[] { "public.text" }
         };
diff --git a/src/StructuredLogViewer/MainWindow.xaml.cs b/src/StructuredLogViewer/MainWindow.xaml.cs
index 892257128..dc93cbed0 100644
--- a/src/StructuredLogViewer/MainWindow.xaml.cs
+++ b/src/StructuredLogViewer/MainWindow.xaml.cs
@@ -836,7 +836,7 @@ private void OpenLogFile()
         private void OpenProjectOrSolution()
         {
             var openFileDialog = new OpenFileDialog();
-            openFileDialog.Filter = "MSBuild projects and solutions (*.sln;*.*proj)|*.sln;*.*proj|All files (*.*)|*";
+            openFileDialog.Filter = "MSBuild projects and solutions (*.sln;*.slnx;*.*proj)|*.sln;*.slnx;*.*proj|All files (*.*)|*";
             openFileDialog.Title = "Open a solution or project";
             openFileDialog.CheckFileExists = true;
             var result = openFileDialog.ShowDialog(this);