Enable Microsoft.CodeAnalysis.NetAnalyzers

src/Directory.Build.props

@@ -6,15 +6,25 @@
     <LangVersion>latest</LangVersion>
     <Nullable>Enable</Nullable>
     <WarningsAsErrors>nullable</WarningsAsErrors>
+    <AnalysisLevel>8</AnalysisLevel>
+    <RunAnalyzersDuringBuild>true</RunAnalyzersDuringBuild>
+    <RunAnalyzersDuringLiveAnalysis>true</RunAnalyzersDuringLiveAnalysis>
+    <_SkipUpgradeNetAnalyzersNuGetWarning>true</_SkipUpgradeNetAnalyzersNuGetWarning>
+    <AccelerateBuildsInVisualStudio>true</AccelerateBuildsInVisualStudio>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
     <SystemConfigurationConfigurationManagerPackageVersion>4.5.0</SystemConfigurationConfigurationManagerPackageVersion>
     <MicrosoftSourceLinkGitHubPackageVersion>8.0.0</MicrosoftSourceLinkGitHubPackageVersion>
+    <!-- Analyzer packages -->
+    <MicrosoftNetAnalyzersPackageVersion>8.0.0</MicrosoftNetAnalyzersPackageVersion>
     <!-- Test Packages -->
     <MicrosoftNetTestSdkPackageVersion>17.11.1</MicrosoftNetTestSdkPackageVersion>
     <NUnitAnalyzersPackageVersion>4.3.0</NUnitAnalyzersPackageVersion>
     <NUnitPackageVersion>4.2.2</NUnitPackageVersion>
     <NUnit3TestAdapterPackageVersion>4.6.0</NUnit3TestAdapterPackageVersion>
     <QuackersTestLoggerPackageVersion>1.0.25</QuackersTestLoggerPackageVersion>
   </PropertyGroup>
+  <ItemGroup>
+    <GlobalAnalyzerConfigFiles Include="$(MSBuildThisFileDirectory)\log4net.globalconfig" />
+  </ItemGroup>
 </Project>

src/log4net.Tests/Appender/AdoNet/Log4NetCommand.cs

@@ -24,7 +24,7 @@
 
 namespace log4net.Tests.Appender.AdoNet;
 
-public class Log4NetCommand : IDbCommand
+internal sealed class Log4NetCommand : IDbCommand
 {
   public Log4NetCommand()
   {
@@ -48,10 +48,7 @@ public int ExecuteNonQuery()
 
   public int ExecuteNonQueryCount { get; private set; }
 
-  public IDbDataParameter CreateParameter()
-  {
-    return new Log4NetParameter();
-  }
+  public IDbDataParameter CreateParameter() => new Log4NetParameter();
 
 #pragma warning disable CS8766 // Nullability of reference types in return type doesn't match implicitly implemented member (possibly because of nullability attributes).
   public string? CommandText { get; set; }
@@ -68,25 +65,13 @@ public void Prepare()
 
   public static Log4NetCommand? MostRecentInstance { get; private set; }
 
-  public void Cancel()
-  {
-    throw new NotImplementedException();
-  }
+  public void Cancel() => throw new NotImplementedException();
 
-  public IDataReader ExecuteReader()
-  {
-    throw new NotImplementedException();
-  }
+  public IDataReader ExecuteReader() => throw new NotImplementedException();
 
-  public IDataReader ExecuteReader(CommandBehavior behavior)
-  {
-    throw new NotImplementedException();
-  }
+  public IDataReader ExecuteReader(CommandBehavior behavior) => throw new NotImplementedException();
 
-  public object ExecuteScalar()
-  {
-    throw new NotImplementedException();
-  }
+  public object ExecuteScalar() => throw new NotImplementedException();
 
   public IDbConnection? Connection
   {

src/log4net.Tests/Appender/AdoNet/Log4NetConnection.cs

@@ -21,62 +21,40 @@
 
 using System;
 using System.Data;
+using System.Diagnostics.CodeAnalysis;
 
 namespace log4net.Tests.Appender.AdoNet;
 
-public class Log4NetConnection : IDbConnection
+[SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses", Justification = "Reflection")]
+internal sealed class Log4NetConnection : IDbConnection
 {
   private bool _open;
 
-  public Log4NetConnection()
-  {
-    MostRecentInstance = this;
-  }
+  public Log4NetConnection() => MostRecentInstance = this;
 
-  public void Close()
-  {
-    _open = false;
-  }
+  public void Close() => _open = false;
 
   public ConnectionState State => _open ? ConnectionState.Open : ConnectionState.Closed;
 
 #pragma warning disable CS8766 // Nullability of reference types in return type doesn't match implicitly implemented member (possibly because of nullability attributes).
   public string? ConnectionString { get; set; }
 #pragma warning restore CS8766
 
-  public IDbTransaction BeginTransaction()
-  {
-    return new Log4NetTransaction();
-  }
+  public IDbTransaction BeginTransaction() => new Log4NetTransaction();
 
-  public IDbCommand CreateCommand()
-  {
-    return new Log4NetCommand();
-  }
+  public IDbCommand CreateCommand() => new Log4NetCommand();
 
-  public void Open()
-  {
-    _open = true;
-  }
+  public void Open() => _open = true;
 
   public static Log4NetConnection? MostRecentInstance { get; private set; }
 
-  public IDbTransaction BeginTransaction(IsolationLevel il)
-  {
-    throw new NotImplementedException();
-  }
+  public IDbTransaction BeginTransaction(IsolationLevel il) => throw new NotImplementedException();
 
-  public void ChangeDatabase(string databaseName)
-  {
-    throw new NotImplementedException();
-  }
+  public void ChangeDatabase(string databaseName) => throw new NotImplementedException();
 
   public int ConnectionTimeout => throw new NotImplementedException();
 
   public string Database => throw new NotImplementedException();
 
-  public void Dispose()
-  {
-    throw new NotImplementedException();
-  }
+  public void Dispose() => throw new NotImplementedException();
 }

src/log4net.Tests/Appender/AdoNet/Log4NetParameterCollection.cs

@@ -26,7 +26,7 @@
 
 namespace log4net.Tests.Appender.AdoNet;
 
-public class Log4NetParameterCollection : CollectionBase, IDataParameterCollection
+internal sealed class Log4NetParameterCollection : CollectionBase, IDataParameterCollection
 {
   private readonly Dictionary<string, int> _parameterNameToIndex = new(StringComparer.Ordinal);
 
@@ -55,13 +55,7 @@ public object this[string parameterName]
     set => InnerList[IndexOf(parameterName)] = value;
   }
 
-  public void RemoveAt(string parameterName)
-  {
-    throw new NotImplementedException();
-  }
+  public void RemoveAt(string parameterName) => throw new NotImplementedException();
 
-  public bool Contains(string parameterName)
-  {
-    throw new NotImplementedException();
-  }
+  public bool Contains(string parameterName) => throw new NotImplementedException();
 }

src/log4net.Tests/Appender/AdoNet/Log4NetTransaction.cs

@@ -24,7 +24,7 @@
 
 namespace log4net.Tests.Appender.AdoNet;
 
-public class Log4NetTransaction : IDbTransaction
+internal sealed class Log4NetTransaction : IDbTransaction
 {
   public void Commit()
   {
@@ -40,8 +40,5 @@ public void Rollback()
 
   public IsolationLevel IsolationLevel => throw new NotImplementedException();
 
-  public void Dispose()
-  {
-    throw new NotImplementedException();
-  }
+  public void Dispose() => throw new NotImplementedException();
 }

src/log4net.Tests/Appender/CountingAppender.cs

@@ -44,17 +44,11 @@ public class CountingAppender : AppenderSkeleton
   /// <summary>
   /// Reset the counter to zero
   /// </summary>
-  public void ResetCounter()
-  {
-    Counter = 0;
-  }
+  public void ResetCounter() => Counter = 0;
 
   /// <summary>
   /// Registers how many times the method has been called.
   /// </summary>
-  /// <param name="logEvent">The logging event.</param>
-  protected override void Append(LoggingEvent logEvent)
-  {
-    Counter++;
-  }
-}
+  /// <param name="loggingEvent">The logging event.</param>
+  protected override void Append(LoggingEvent loggingEvent) => Counter++;
+}

src/log4net.Tests/Appender/EventRaisingAppender.cs

@@ -27,20 +27,9 @@ namespace log4net.Tests.Appender;
 /// <summary>
 /// Provides data for the <see cref="EventRaisingAppender.LoggingEventAppended"/> event.
 /// </summary>
-/// <seealso cref="System.EventArgs" />
-public class LoggingEventEventArgs : EventArgs
+public class LoggingEventEventArgs(LoggingEvent loggingEvent) : EventArgs
 {
-  public LoggingEvent LoggingEvent { get; private set; }
-
-  public LoggingEventEventArgs(LoggingEvent loggingEvent)
-  {
-    if (loggingEvent is null)
-    {
-      throw new ArgumentNullException(nameof(loggingEvent));
-    }
-
-    LoggingEvent = loggingEvent;
-  }
+  public LoggingEvent LoggingEvent { get; } = loggingEvent ?? throw new ArgumentNullException(nameof(loggingEvent));
 }
 
 /// <summary>
@@ -55,18 +44,13 @@ public class EventRaisingAppender : log4net.Appender.IAppender
   public event EventHandler<LoggingEventEventArgs>? LoggingEventAppended;
 
   protected void OnLoggingEventAppended(LoggingEventEventArgs e)
-  {
-    LoggingEventAppended?.Invoke(this, e);
-  }
+    => LoggingEventAppended?.Invoke(this, e);
 
   public void Close()
-  {
-  }
+  { }
 
   public void DoAppend(LoggingEvent loggingEvent)
-  {
-    OnLoggingEventAppended(new LoggingEventEventArgs(loggingEvent));
-  }
+    => OnLoggingEventAppended(new LoggingEventEventArgs(loggingEvent));
 
   public string Name { get; set; } = string.Empty;
-}
+}

src/log4net.Tests/Appender/RollingFileAppenderTest.cs

@@ -170,7 +170,7 @@ private static void CreateFile(int iFileNumber)
         {
           fileStream.Close();
         }
-        catch
+        catch (Exception e) when (e is not null)
         {
           // Ignore
         }
@@ -250,9 +250,9 @@ private static void DeleteTestFiles()
         Debug.WriteLine("Deleting test file " + sFile);
         File.Delete(sFile);
       }
-      catch (Exception ex)
+      catch (Exception e) when (e is not null)
       {
-        Debug.WriteLine("Exception while deleting test file " + ex);
+        Debug.WriteLine("Exception while deleting test file " + e);
       }
     }
   }
@@ -359,19 +359,19 @@ public RollFileEntry(string fileName, long fileLength)
   /// A table of entries showing files that should exist and their expected sizes
   /// after a message is logged
   /// </param>
-  public sealed class RollConditions(List<RollFileEntry> preLogFileEntries, List<RollFileEntry> postLogFileEntries)
+  public sealed class RollConditions(IList<RollFileEntry> preLogFileEntries, IList<RollFileEntry> postLogFileEntries)
   {
     /// <summary>
     /// A table of entries showing files that should exist and their expected sizes
     /// before logging is called
     /// </summary>
-    public List<RollFileEntry> GetPreLogFileEntries() => preLogFileEntries;
+    public IList<RollFileEntry> PreLogFileEntries => preLogFileEntries;
 
     /// <summary>
     /// A table of entries showing files that should exist and their expected sizes
     /// after a message is logged
     /// </summary>
-    public List<RollFileEntry> GetPostLogFileEntries() => postLogFileEntries;
+    public IList<RollFileEntry> PostLogFileEntries => postLogFileEntries;
   }
 
   private static void VerifyExistenceAndRemoveFromList(List<string> alExisting,
@@ -389,7 +389,7 @@ private static void VerifyExistenceAndRemoveFromList(List<string> alExisting,
   /// </summary>
   /// <param name="sBaseFileName"></param>
   /// <param name="fileEntries"></param>
-  private static void VerifyFileConditions(string sBaseFileName, List<RollFileEntry> fileEntries)
+  private static void VerifyFileConditions(string sBaseFileName, IList<RollFileEntry> fileEntries)
   {
     List<string> alExisting = GetExistingFiles(sBaseFileName);
 
@@ -429,7 +429,7 @@ private static void VerifyFileConditions(string sBaseFileName, List<RollFileEntr
   /// <param name="sBaseFileName"></param>
   /// <param name="entry"></param>
   private static void VerifyPreConditions(string sBaseFileName, RollConditions entry)
-    => VerifyFileConditions(sBaseFileName, entry.GetPreLogFileEntries());
+    => VerifyFileConditions(sBaseFileName, entry.PreLogFileEntries);
 
   /// <summary>
   /// Called after logging a message to check that all the expected files exist, 
@@ -439,7 +439,7 @@ private static void VerifyPreConditions(string sBaseFileName, RollConditions ent
   /// <param name="sBaseFileName"></param>
   /// <param name="entry"></param>
   private static void VerifyPostConditions(string sBaseFileName, RollConditions entry)
-    => VerifyFileConditions(sBaseFileName, entry.GetPostLogFileEntries());
+    => VerifyFileConditions(sBaseFileName, entry.PostLogFileEntries);
 
   /// <summary>
   /// Logs a message, verifying the expected message counts against the 
@@ -672,7 +672,7 @@ private static RollConditions BuildTableEntry(string sBackupFiles,
       return new RollConditions(AddFinalElement(null, current), post);
     }
 
-    return new RollConditions(preCondition.GetPostLogFileEntries(), post);
+    return new RollConditions(preCondition.PostLogFileEntries, post);
   }
 
   /// <summary>
@@ -1808,7 +1808,7 @@ private static List<string> GetExistingFiles(string baseFilePath, bool preserveL
   {
     2 => TestMessage98Chars,
     1 => TestMessage99Chars,
-    _ => throw new Exception("Unexpected Environment.NewLine.Length"),
+    _ => throw new InvalidOperationException("Unexpected Environment.NewLine.Length"),
   };
 }
 
@@ -1818,15 +1818,13 @@ public sealed class RollingFileAppenderSubClassTest : RollingFileAppender
   [Test]
   public void TestComputeCheckPeriod()
   {
-    RollingFileAppender rfa = new();
-
-    Assert.That(rfa.ComputeCheckPeriod(".yyyy-MM-dd HH:mm"), Is.EqualTo(RollPoint.TopOfMinute), "TopOfMinute pattern");
-    Assert.That(rfa.ComputeCheckPeriod(".yyyy-MM-dd HH"), Is.EqualTo(RollPoint.TopOfHour), "TopOfHour pattern");
-    Assert.That(rfa.ComputeCheckPeriod(".yyyy-MM-dd tt"), Is.EqualTo(RollPoint.HalfDay), "HalfDay pattern");
-    Assert.That(rfa.ComputeCheckPeriod(".yyyy-MM-dd"), Is.EqualTo(RollPoint.TopOfDay), "TopOfDay pattern");
-    Assert.That(rfa.ComputeCheckPeriod(".yyyy-MM"), Is.EqualTo(RollPoint.TopOfMonth), "TopOfMonth pattern");
+    Assert.That(ComputeCheckPeriod(".yyyy-MM-dd HH:mm"), Is.EqualTo(RollPoint.TopOfMinute), "TopOfMinute pattern");
+    Assert.That(ComputeCheckPeriod(".yyyy-MM-dd HH"), Is.EqualTo(RollPoint.TopOfHour), "TopOfHour pattern");
+    Assert.That(ComputeCheckPeriod(".yyyy-MM-dd tt"), Is.EqualTo(RollPoint.HalfDay), "HalfDay pattern");
+    Assert.That(ComputeCheckPeriod(".yyyy-MM-dd"), Is.EqualTo(RollPoint.TopOfDay), "TopOfDay pattern");
+    Assert.That(ComputeCheckPeriod(".yyyy-MM"), Is.EqualTo(RollPoint.TopOfMonth), "TopOfMonth pattern");
 
     // Test invalid roll point
-    Assert.That(rfa.ComputeCheckPeriod("..."), Is.EqualTo(RollPoint.InvalidRollPoint), "TopOfMonth pattern");
+    Assert.That(ComputeCheckPeriod("..."), Is.EqualTo(RollPoint.InvalidRollPoint), "TopOfMonth pattern");
   }
 }