diff --git a/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs b/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
index 2e9375960a..125d8cdded 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
@@ -62,7 +62,7 @@ protected override IEnumerable<ManiaHitObject> ConvertHitObject(HitObject origin
                 yield return obj;
         }
 
-        private List<double> prevNoteTimes = new List<double>(max_notes_for_density);
+        private readonly List<double> prevNoteTimes = new List<double>(max_notes_for_density);
         private double density = int.MaxValue;
         private void computeDensity(double newNoteTime)
         {
diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
index 4b65fb7bfd..07438d5f2c 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
@@ -89,7 +89,7 @@ public override Pattern Generate()
         {
             int lastColumn = PreviousPattern.HitObjects.First().Column;
 
-            if ((convertType & PatternType.Reverse) > 0 && PreviousPattern.HitObjects.Count() > 0)
+            if ((convertType & PatternType.Reverse) > 0 && PreviousPattern.HitObjects.Any())
             {
                 // Generate a new pattern by copying the last hit objects in reverse-column order
                 var pattern = new Pattern();
@@ -116,7 +116,7 @@ public override Pattern Generate()
                 return pattern;
             }
 
-            if ((convertType & PatternType.ForceStack) > 0 && PreviousPattern.HitObjects.Count() > 0)
+            if ((convertType & PatternType.ForceStack) > 0 && PreviousPattern.HitObjects.Any())
             {
                 // Generate a new pattern by placing on the already filled columns
                 var pattern = new Pattern();
@@ -217,7 +217,7 @@ private Pattern generateRandomNotes(int noteCount)
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             for (int i = 0; i < noteCount; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn) || (PreviousPattern.ColumnHasObject(nextColumn) && !allowStacking))
+                while (pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn) && !allowStacking)
                 {
                     if ((convertType & PatternType.Gathered) > 0)
                     {