diff --git a/DryWetMidi.Tests/Devices/Playback/PlaybackTests.cs b/DryWetMidi.Tests/Devices/Playback/PlaybackTests.cs
index 4d4fff6c4..dc6dbdf18 100644
--- a/DryWetMidi.Tests/Devices/Playback/PlaybackTests.cs
+++ b/DryWetMidi.Tests/Devices/Playback/PlaybackTests.cs
@@ -47,7 +47,7 @@ private sealed class PlaybackContext
 
         private static readonly PlaybackAction NoPlaybackAction = (context, playback) => { };
 
-        private static readonly object[] ParametersForDurationCheck = new[]
+        private static readonly object[] ParametersForDurationCheck =
         {
             new object[] { TimeSpan.Zero, TimeSpan.FromSeconds(2) },
             new object[] { TimeSpan.FromMilliseconds(500), TimeSpan.FromSeconds(3) },
diff --git a/DryWetMidi.Tests/Devices/Recording/RecordingTests.cs b/DryWetMidi.Tests/Devices/Recording/RecordingTests.cs
index 796efd53b..5138f30f6 100644
--- a/DryWetMidi.Tests/Devices/Recording/RecordingTests.cs
+++ b/DryWetMidi.Tests/Devices/Recording/RecordingTests.cs
@@ -18,7 +18,7 @@ public sealed class RecordingTests
 
         private const int RetriesNumber = 3;
 
-        private static readonly object[] ParametersForDurationCheck = new[]
+        private static readonly object[] ParametersForDurationCheck =
         {
             new object[] { TimeSpan.Zero, TimeSpan.FromSeconds(2) },
             new object[] { TimeSpan.FromMilliseconds(500), TimeSpan.FromSeconds(3) },
diff --git a/DryWetMidi.Tests/Smf.Interaction/Pattern/PatternTests.cs b/DryWetMidi.Tests/Smf.Interaction/Pattern/PatternTests.cs
index 3a99924e3..98ebb7871 100644
--- a/DryWetMidi.Tests/Smf.Interaction/Pattern/PatternTests.cs
+++ b/DryWetMidi.Tests/Smf.Interaction/Pattern/PatternTests.cs
@@ -130,7 +130,6 @@ public void Note_Multiple_MetricLengths()
                 new NoteInfo(NoteName.B, 2, new MetricTimeSpan(0, 1, 24), new MetricTimeSpan(0, 0, 5)),
             });
 
-            var tempoMap = midiFile.GetTempoMap();
             Assert.AreEqual(new MetricTimeSpan(0, 1, 29), midiFile.GetDuration<MetricTimeSpan>());
         }
 
@@ -157,7 +156,6 @@ public void Note_Multiple_MetricLengths_TempoChanged()
                       .Select(i => Tuple.Create(i * 1000L, new Tempo(i * 100 + 10)))
                       .ToArray());
 
-            var tempoMap = midiFile.GetTempoMap();
             Assert.AreEqual(new MetricTimeSpan(0, 1, 29).TotalMicroseconds,
                             midiFile.GetDuration<MetricTimeSpan>().TotalMicroseconds);
         }
diff --git a/DryWetMidi.Tests/Smf.Interaction/TimeSpan/MetricTimeSpanTests.cs b/DryWetMidi.Tests/Smf.Interaction/TimeSpan/MetricTimeSpanTests.cs
index 786a4b63f..e672afcec 100644
--- a/DryWetMidi.Tests/Smf.Interaction/TimeSpan/MetricTimeSpanTests.cs
+++ b/DryWetMidi.Tests/Smf.Interaction/TimeSpan/MetricTimeSpanTests.cs
@@ -53,7 +53,7 @@ public sealed class MetricTimeSpanTests
             Tuple.Create(new MetricTimeSpan(10000), new MetricTimeSpan(10000)),
         };
 
-        private static readonly object[] ParametersForValidParseCheck = new[]
+        private static readonly object[] ParametersForValidParseCheck =
         {
             new object[] { "0:0:0:0", new MetricTimeSpan() },
             new object[] { "0:0:0", new MetricTimeSpan() },
diff --git a/DryWetMidi/Devices/InputDevice/InputDevice.cs b/DryWetMidi/Devices/InputDevice/InputDevice.cs
index 04622429a..7ac4ec666 100644
--- a/DryWetMidi/Devices/InputDevice/InputDevice.cs
+++ b/DryWetMidi/Devices/InputDevice/InputDevice.cs
@@ -55,8 +55,6 @@ public sealed class InputDevice : MidiDevice
         private readonly MemoryStream _channelMessageMemoryStream = new MemoryStream(ChannelParametersBufferSize);
         private readonly MidiReader _channelEventReader;
 
-        private readonly MemoryStream _sysExMessageMemoryStream = new MemoryStream(SysExBufferLength);
-        private readonly MidiReader _sysExEventReader;
         private IntPtr _sysExHeaderPointer = IntPtr.Zero;
 
         private MidiWinApi.MidiMessageCallback _callback;
@@ -67,11 +65,10 @@ public sealed class InputDevice : MidiDevice
 
         #region Constructor
 
-        internal InputDevice(int id)
+        private InputDevice(int id)
             : base(id)
         {
             _channelEventReader = new MidiReader(_channelMessageMemoryStream);
-            _sysExEventReader = new MidiReader(_sysExMessageMemoryStream);
 
             SetDeviceInformation();
         }
diff --git a/DryWetMidi/Devices/MidiDeviceException.cs b/DryWetMidi/Devices/MidiDeviceException.cs
index a8433d890..191a559a7 100644
--- a/DryWetMidi/Devices/MidiDeviceException.cs
+++ b/DryWetMidi/Devices/MidiDeviceException.cs
@@ -13,7 +13,6 @@ public sealed class MidiDeviceException : Exception
         /// Initializes a new instance of the <see cref="MidiDeviceException"/>.
         /// </summary>
         public MidiDeviceException()
-            : base()
         {
         }
 
diff --git a/DryWetMidi/Devices/OutputDevice/OutputDevice.cs b/DryWetMidi/Devices/OutputDevice/OutputDevice.cs
index 9f4631cfe..552222110 100644
--- a/DryWetMidi/Devices/OutputDevice/OutputDevice.cs
+++ b/DryWetMidi/Devices/OutputDevice/OutputDevice.cs
@@ -19,8 +19,6 @@ public sealed class OutputDevice : MidiDevice
         private const int ChannelEventBufferSize = 3;
         private static readonly byte[] ZeroBuffer = new byte[ChannelEventBufferSize];
 
-        private const int SysExBufferLength = 2048;
-
         #endregion
 
         #region Events
diff --git a/DryWetMidi/Devices/Playback/Snapping/PlaybackSnapping.cs b/DryWetMidi/Devices/Playback/Snapping/PlaybackSnapping.cs
index 12ff7dbfd..4dd537663 100644
--- a/DryWetMidi/Devices/Playback/Snapping/PlaybackSnapping.cs
+++ b/DryWetMidi/Devices/Playback/Snapping/PlaybackSnapping.cs
@@ -3,7 +3,6 @@
 using System.Linq;
 using Melanchall.DryWetMidi.Common;
 using Melanchall.DryWetMidi.Smf.Interaction;
-using Melanchall.DryWetMidi.Tools;
 
 namespace Melanchall.DryWetMidi.Devices
 {
diff --git a/DryWetMidi/Tools/CsvConverter/Common/CsvReader.cs b/DryWetMidi/Tools/CsvConverter/Common/CsvReader.cs
index 78f315810..9ff07247a 100644
--- a/DryWetMidi/Tools/CsvConverter/Common/CsvReader.cs
+++ b/DryWetMidi/Tools/CsvConverter/Common/CsvReader.cs
@@ -11,8 +11,6 @@ internal sealed class CsvReader : IDisposable
         #region Constants
 
         private const char Quote = '"';
-        private const string QuoteString = "\"";
-        private const string DoubleQuote = "\"\"";
 
         #endregion
 
diff --git a/DryWetMidi/Tools/CsvConverter/MidiFile/ToCsv/MidiFileToCsvConverter.cs b/DryWetMidi/Tools/CsvConverter/MidiFile/ToCsv/MidiFileToCsvConverter.cs
index ba87a174b..593edef0d 100644
--- a/DryWetMidi/Tools/CsvConverter/MidiFile/ToCsv/MidiFileToCsvConverter.cs
+++ b/DryWetMidi/Tools/CsvConverter/MidiFile/ToCsv/MidiFileToCsvConverter.cs
@@ -208,7 +208,7 @@ private static void WriteRecord(CsvWriter csvWriter,
         private static object[] ProcessParameter(object parameter)
         {
             if (parameter == null)
-                return new[] { string.Empty };
+                return new object[] { string.Empty };
 
             var bytes = parameter as byte[];
             if (bytes != null)
diff --git a/DryWetMidi/Tools/CsvConverter/Notes/NotesToCsvConverter.cs b/DryWetMidi/Tools/CsvConverter/Notes/NotesToCsvConverter.cs
index 0039e8b1d..9736e2b20 100644
--- a/DryWetMidi/Tools/CsvConverter/Notes/NotesToCsvConverter.cs
+++ b/DryWetMidi/Tools/CsvConverter/Notes/NotesToCsvConverter.cs
@@ -15,7 +15,7 @@ public static void ConvertToCsv(IEnumerable<Note> notes, Stream stream, TempoMap
             {
                 foreach (var note in notes.Where(n => n != null))
                 {
-                    csvWriter.WriteRecord(new object[]
+                    csvWriter.WriteRecord(new[]
                     {
                         note.TimeAs(settings.TimeType, tempoMap),
                         note.Channel,