diff --git a/Azaion.Annotator/DTO/AnnotationInfo.cs b/Azaion.Annotator/DTO/AnnotationInfo.cs
index 19e6574..765119a 100644
--- a/Azaion.Annotator/DTO/AnnotationInfo.cs
+++ b/Azaion.Annotator/DTO/AnnotationInfo.cs
@@ -21,15 +21,7 @@ public class AnnotationInfo
         Height = height;
     }
 
-    public override string ToString() => string.Concat(ClassNumber.ToString(),
-        " ",
-        X.ToString("F5", CultureInfo.InvariantCulture),
-        " ",
-        Y.ToString("F5", CultureInfo.InvariantCulture),
-        " ",
-        Width.ToString("F5", CultureInfo.InvariantCulture),
-        " ",
-        Height.ToString("F5", CultureInfo.InvariantCulture));
+    public override string ToString() => $"{ClassNumber} {X:F5} {Y:F5} {Width:F5} {Height:F5}".Replace(',', '.');
 
     public AnnotationInfo ToLabelCoordinates(Size canvasSize, Size videoSize)
     {