Address review.

src/Avalonia.Controls/Converters/StringFormatConverter.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using System.Linq;
 using Avalonia.Data.Converters;
 
 namespace Avalonia.Controls.Converters;
@@ -13,19 +14,11 @@ public class StringFormatConverter : IMultiValueConverter
 {
     public object? Convert(IList<object?> values, Type targetType, object? parameter, CultureInfo culture)
     {
-        if (values != null &&
+        if (values[0] is string format)
-            values.Count == 5 &&
-            values[0] is string format &&
-            values[1] is double &&
-            values[2] is double &&
-            values[3] is double &&
-            values[4] is double)
-
         {
-
             try
             {
-                return string.Format(format, values[1], values[2], values[3], values[4]);
+                return string.Format(format, values.Skip(1).ToArray());
             }
             catch
             {