remove fix, todo: test

Azaion.Common/Database/Annotation.cs

@@ -36,6 +36,30 @@ public class Annotation
     public string ImagePath => Path.Combine(_imagesDir, $"{Name}{ImageExtension}");
     public string LabelPath => Path.Combine(_labelsDir, $"{Name}.txt");
     public string ThumbPath => Path.Combine(_thumbDir, $"{Name}{Constants.THUMBNAIL_PREFIX}.jpg");
+
+    private TimeSpan? _time;
+    public TimeSpan Time
+    {
+        get
+        {
+            if (_time.HasValue)
+                return _time.Value;
+
+            var timeStr = Name.Split("_").LastOrDefault();
+
+            //For some reason, TimeSpan.ParseExact doesn't work on every platform.
+            if (!string.IsNullOrEmpty(timeStr) &&
+                timeStr.Length == 6 &&
+                int.TryParse(timeStr[..1], out var hours) &&
+                int.TryParse(timeStr[1..3], out var minutes) &&
+                int.TryParse(timeStr[3..5], out var seconds) &&
+                int.TryParse(timeStr[5..], out var milliseconds))
+                return new TimeSpan(0, hours, minutes, seconds, milliseconds * 100);
+
+            _time = TimeSpan.FromSeconds(0);
+            return _time.Value;
+        }
+    }
 }