diff --git a/.editorconfig b/.editorconfig
index 77dfa19a..86b3f62d 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -153,6 +153,8 @@ dotnet_diagnostic.IDE0028.severity = warning
 dotnet_diagnostic.IDE0300.severity = warning
 # IDE0301: Use collection expression for empty
 dotnet_diagnostic.IDE0301.severity = warning
+# IDE0305: Use collection expression for fluent
+dotnet_diagnostic.IDE0305.severity = warning
 
 [{ColumnHeaderAttribute.cs,ColumnOrderAttribute.cs,WorksheetRowAttribute.cs}]
 # CA1019: Define accessors for attribute arguments
diff --git a/SpreadCheetah.SourceGenerator/Extensions/EnumerableExtensions.cs b/SpreadCheetah.SourceGenerator/Extensions/EnumerableExtensions.cs
index e9bfe177..dbaceb0d 100644
--- a/SpreadCheetah.SourceGenerator/Extensions/EnumerableExtensions.cs
+++ b/SpreadCheetah.SourceGenerator/Extensions/EnumerableExtensions.cs
@@ -12,7 +12,7 @@ internal static class EnumerableExtensions
     public static EquatableArray<T> ToEquatableArray<T>(this IEnumerable<T> elements)
         where T : IEquatable<T>
     {
-        var array = elements is T[] arr ? arr : elements.ToArray();
+        var array = elements is T[] arr ? arr : [.. elements];
         return new EquatableArray<T>(array);
     }
 }
diff --git a/SpreadCheetah/MetadataXml/StylesXml.cs b/SpreadCheetah/MetadataXml/StylesXml.cs
index 58cd378e..e96d3e84 100644
--- a/SpreadCheetah/MetadataXml/StylesXml.cs
+++ b/SpreadCheetah/MetadataXml/StylesXml.cs
@@ -15,7 +15,7 @@ public static ValueTask WriteAsync(
         CancellationToken token)
     {
         var entry = archive.CreateEntry("xl/styles.xml", compressionLevel);
-        var writer = new StylesXml(styles.Keys.ToList());
+        var writer = new StylesXml([.. styles.Keys]);
 #pragma warning disable EPS06 // Hidden struct copy operation
         return writer.WriteAsync(entry, buffer, token);
 #pragma warning restore EPS06 // Hidden struct copy operation
@@ -51,10 +51,10 @@ private StylesXml(List<ImmutableStyle> styles)
         _borders = CreateBorderDictionary(styles);
         _fills = CreateFillDictionary(styles);
         _fonts = CreateFontDictionary(styles);
-        _numberFormatsXml = new StyleNumberFormatsXml(_customNumberFormats?.ToList());
-        _bordersXml = new StyleBordersXml(_borders.Keys.ToList());
-        _fillsXml = new StyleFillsXml(_fills.Keys.ToList());
-        _fontsXml = new StyleFontsXml(_fonts.Keys.ToList());
+        _numberFormatsXml = new StyleNumberFormatsXml(_customNumberFormats is { } formats ? [.. formats] : null);
+        _bordersXml = new StyleBordersXml([.. _borders.Keys]);
+        _fillsXml = new StyleFillsXml([.. _fills.Keys]);
+        _fontsXml = new StyleFontsXml([.. _fonts.Keys]);
         _styles = styles;
     }
 
diff --git a/SpreadCheetah/MetadataXml/WorksheetStartXml.cs b/SpreadCheetah/MetadataXml/WorksheetStartXml.cs
index f12b3e7b..e120cbf2 100644
--- a/SpreadCheetah/MetadataXml/WorksheetStartXml.cs
+++ b/SpreadCheetah/MetadataXml/WorksheetStartXml.cs
@@ -21,7 +21,7 @@ internal struct WorksheetStartXml : IXmlWriter
     public WorksheetStartXml(WorksheetOptions? options)
     {
         _options = options;
-        _columns = options?.ColumnOptions.ToList();
+        _columns = options is not null ? [.. options.ColumnOptions] : null;
     }
 
     public bool TryWrite(Span<byte> bytes, out int bytesWritten)