Mark private and internal classes as sealed when appropriate

src/OpenTelemetry.Api/Baggage.cs

@@ -377,7 +377,7 @@ private static BaggageHolder EnsureBaggageHolder()
             return baggageHolder;
         }
 
-        private class BaggageHolder
+        private sealed class BaggageHolder
         {
             public Baggage Baggage;
         }

src/OpenTelemetry.Api/Internal/OpenTelemetryApiEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Internal
     /// This is used for internal logging of this library.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Api")]
-    internal class OpenTelemetryApiEventSource : EventSource
+    internal sealed class OpenTelemetryApiEventSource : EventSource
     {
         public static OpenTelemetryApiEventSource Log = new();
 

src/OpenTelemetry.Exporter.Jaeger/ApacheThrift/Protocol/TProtocolException.cs

@@ -1,4 +1,4 @@
-// <auto-generated/> (Turns off StyleCop analysis in this file.)
+// <auto-generated/> (Turns off StyleCop analysis in this file.)
 
 // Licensed to the Apache Software Foundation(ASF) under one
 // or more contributor license agreements.See the NOTICE file

src/OpenTelemetry.Exporter.Jaeger/ApacheThrift/TException.cs

@@ -1,4 +1,4 @@
-// <auto-generated/> (Turns off StyleCop analysis in this file.)
+// <auto-generated/> (Turns off StyleCop analysis in this file.)
 
 // Licensed to the Apache Software Foundation(ASF) under one
 // or more contributor license agreements.See the NOTICE file

src/OpenTelemetry.Exporter.Jaeger/Implementation/JaegerExporterEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Exporter.Jaeger.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Exporter-Jaeger")]
-    internal class JaegerExporterEventSource : EventSource
+    internal sealed class JaegerExporterEventSource : EventSource
     {
         public static JaegerExporterEventSource Log = new();
 

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/OpenTelemetryProtocolExporterEventSource.cs

@@ -21,7 +21,7 @@
 namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation
 {
     [EventSource(Name = "OpenTelemetry-Exporter-OpenTelemetryProtocol")]
-    internal class OpenTelemetryProtocolExporterEventSource : EventSource
+    internal sealed class OpenTelemetryProtocolExporterEventSource : EventSource
     {
         public static readonly OpenTelemetryProtocolExporterEventSource Log = new();
 

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OtlpLogExporter.cs

@@ -28,7 +28,7 @@ namespace OpenTelemetry.Exporter
     /// Exporter consuming <see cref="LogRecord"/> and exporting the data using
     /// the OpenTelemetry protocol (OTLP).
     /// </summary>
-    internal class OtlpLogExporter : BaseExporter<LogRecord>
+    internal sealed class OtlpLogExporter : BaseExporter<LogRecord>
     {
         private readonly SdkLimitOptions sdkLimitOptions;
         private readonly IExportClient<OtlpCollector.ExportLogsServiceRequest> exportClient;

src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityAggregate.cs

@@ -22,7 +22,7 @@ namespace OpenTelemetry.Exporter.ZPages.Implementation
     /// <summary>
     /// Stores the activity information aggregated according to activity name.
     /// </summary>
-    internal class ZPagesActivityAggregate
+    internal sealed class ZPagesActivityAggregate
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ZPagesActivityAggregate"/> class.

src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesExporterEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Exporter.ZPages.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Exporter-ZPages")]
-    internal class ZPagesExporterEventSource : EventSource
+    internal sealed class ZPagesExporterEventSource : EventSource
     {
         public static ZPagesExporterEventSource Log = new();
 

src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesStatsBuilder.cs

@@ -16,7 +16,7 @@
 
 namespace OpenTelemetry.Exporter.ZPages.Implementation
 {
-    internal class ZPagesStatsBuilder
+    internal sealed class ZPagesStatsBuilder
     {
         public const string ContentType = "text/html";
     }

src/OpenTelemetry.Exporter.Zipkin/Implementation/ZipkinEndpoint.cs

@@ -19,7 +19,7 @@
 
 namespace OpenTelemetry.Exporter.Zipkin.Implementation
 {
-    internal class ZipkinEndpoint
+    internal sealed class ZipkinEndpoint
     {
         public ZipkinEndpoint(string serviceName)
             : this(serviceName, null, null, null, null)

src/OpenTelemetry.Exporter.Zipkin/Implementation/ZipkinExporterEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Exporter.Zipkin.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Exporter-Zipkin")]
-    internal class ZipkinExporterEventSource : EventSource
+    internal sealed class ZipkinExporterEventSource : EventSource
     {
         public static ZipkinExporterEventSource Log = new();
 

src/OpenTelemetry.Extensions.Hosting/Implementation/HostingExtensionsEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Extensions.Hosting.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Extensions-Hosting")]
-    internal class HostingExtensionsEventSource : EventSource
+    internal sealed class HostingExtensionsEventSource : EventSource
     {
         public static HostingExtensionsEventSource Log = new();
 

src/OpenTelemetry.Extensions.Propagators/OpenTelemetryPropagatorsEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Internal
     /// This is used for internal logging of this library.
     /// </summary>
     [EventSource(Name = "OpenTelemetry.Extensions.Propagators")]
-    internal class OpenTelemetryPropagatorsEventSource : EventSource
+    internal sealed class OpenTelemetryPropagatorsEventSource : EventSource
     {
         public static OpenTelemetryPropagatorsEventSource Log = new();
 

src/OpenTelemetry.Instrumentation.AspNetCore/AspNetCoreInstrumentation.cs

@@ -22,7 +22,7 @@ namespace OpenTelemetry.Instrumentation.AspNetCore
     /// <summary>
     /// Asp.Net Core Requests instrumentation.
     /// </summary>
-    internal class AspNetCoreInstrumentation : IDisposable
+    internal sealed class AspNetCoreInstrumentation : IDisposable
     {
         private static readonly HashSet<string> DiagnosticSourceEvents = new()
         {

src/OpenTelemetry.Instrumentation.AspNetCore/AspNetCoreMetrics.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Instrumentation.AspNetCore
     /// <summary>
     /// Asp.Net Core Requests instrumentation.
     /// </summary>
-    internal class AspNetCoreMetrics : IDisposable
+    internal sealed class AspNetCoreMetrics : IDisposable
     {
         internal static readonly AssemblyName AssemblyName = typeof(HttpInListener).Assembly.GetName();
         internal static readonly string InstrumentationName = AssemblyName.Name;

src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/AspNetCoreInstrumentationEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Instrumentation.AspNetCore.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Instrumentation-AspNetCore")]
-    internal class AspNetCoreInstrumentationEventSource : EventSource
+    internal sealed class AspNetCoreInstrumentationEventSource : EventSource
     {
         public static AspNetCoreInstrumentationEventSource Log = new();
 

src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInMetricsListener.cs

@@ -24,7 +24,7 @@
 
 namespace OpenTelemetry.Instrumentation.AspNetCore.Implementation
 {
-    internal class HttpInMetricsListener : ListenerHandler
+    internal sealed class HttpInMetricsListener : ListenerHandler
     {
         private const string OnStopEvent = "Microsoft.AspNetCore.Hosting.HttpRequestIn.Stop";
 

src/OpenTelemetry.Instrumentation.GrpcNetClient/GrpcClientInstrumentation.cs

@@ -21,7 +21,7 @@ namespace OpenTelemetry.Instrumentation.GrpcNetClient
     /// <summary>
     /// GrpcClient instrumentation.
     /// </summary>
-    internal class GrpcClientInstrumentation : IDisposable
+    internal sealed class GrpcClientInstrumentation : IDisposable
     {
         private readonly DiagnosticSourceSubscriber diagnosticSourceSubscriber;
 

src/OpenTelemetry.Instrumentation.GrpcNetClient/Implementation/GrpcInstrumentationEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Instrumentation.GrpcNetClient.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Instrumentation-Grpc")]
-    internal class GrpcInstrumentationEventSource : EventSource
+    internal sealed class GrpcInstrumentationEventSource : EventSource
     {
         public static GrpcInstrumentationEventSource Log = new();
 

src/OpenTelemetry.Instrumentation.Http/HttpClientInstrumentation.cs

@@ -21,7 +21,7 @@ namespace OpenTelemetry.Instrumentation.Http
     /// <summary>
     /// HttpClient instrumentation.
     /// </summary>
-    internal class HttpClientInstrumentation : IDisposable
+    internal sealed class HttpClientInstrumentation : IDisposable
     {
         private readonly DiagnosticSourceSubscriber diagnosticSourceSubscriber;
 

src/OpenTelemetry.Instrumentation.Http/HttpClientMetrics.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Instrumentation.Http
     /// <summary>
     /// HttpClient instrumentation.
     /// </summary>
-    internal class HttpClientMetrics : IDisposable
+    internal sealed class HttpClientMetrics : IDisposable
     {
         internal static readonly AssemblyName AssemblyName = typeof(HttpClientMetrics).Assembly.GetName();
         internal static readonly string InstrumentationName = AssemblyName.Name;

src/OpenTelemetry.Instrumentation.Http/Implementation/HttpHandlerMetricsDiagnosticListener.cs

@@ -22,7 +22,7 @@
 
 namespace OpenTelemetry.Instrumentation.Http.Implementation
 {
-    internal class HttpHandlerMetricsDiagnosticListener : ListenerHandler
+    internal sealed class HttpHandlerMetricsDiagnosticListener : ListenerHandler
     {
         internal const string OnStopEvent = "System.Net.Http.HttpRequestOut.Stop";
 

src/OpenTelemetry.Instrumentation.Http/Implementation/HttpInstrumentationEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Instrumentation.Http.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Instrumentation-Http")]
-    internal class HttpInstrumentationEventSource : EventSource
+    internal sealed class HttpInstrumentationEventSource : EventSource
     {
         public static HttpInstrumentationEventSource Log = new();
 

src/OpenTelemetry.Instrumentation.SqlClient/Implementation/SqlActivitySourceHelper.cs

@@ -25,7 +25,7 @@ namespace OpenTelemetry.Instrumentation.SqlClient.Implementation
     /// Helper class to hold common properties used by both SqlClientDiagnosticListener on .NET Core
     /// and SqlEventSourceListener on .NET Framework.
     /// </summary>
-    internal class SqlActivitySourceHelper
+    internal sealed class SqlActivitySourceHelper
     {
         public const string MicrosoftSqlServerDatabaseSystemName = "mssql";
 

src/OpenTelemetry.Instrumentation.SqlClient/Implementation/SqlClientInstrumentationEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Instrumentation.SqlClient.Implementation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Instrumentation-SqlClient")]
-    internal class SqlClientInstrumentationEventSource : EventSource
+    internal sealed class SqlClientInstrumentationEventSource : EventSource
     {
         public static SqlClientInstrumentationEventSource Log = new();
 

src/OpenTelemetry.Instrumentation.SqlClient/SqlClientInstrumentation.cs

@@ -21,7 +21,7 @@ namespace OpenTelemetry.Instrumentation.SqlClient
     /// <summary>
     /// SqlClient instrumentation.
     /// </summary>
-    internal class SqlClientInstrumentation : IDisposable
+    internal sealed class SqlClientInstrumentation : IDisposable
     {
         internal const string SqlClientDiagnosticListenerName = "SqlClientDiagnosticListener";
 

src/OpenTelemetry.Instrumentation.SqlClient/SqlClientInstrumentationOptions.cs

@@ -270,7 +270,7 @@ internal void AddConnectionLevelDetailsToActivity(string dataSource, Activity sq
             }
         }
 
-        internal class SqlConnectionDetails
+        internal sealed class SqlConnectionDetails
         {
             public string ServerHostName { get; set; }
 

src/OpenTelemetry.Shims.OpenTracing/ScopeManagerShim.cs

@@ -95,7 +95,7 @@ public IScope Activate(ISpan span, bool finishSpanOnDispose)
             return instrumentation;
         }
 
-        private class ScopeInstrumentation : IScope
+        private sealed class ScopeInstrumentation : IScope
         {
             private readonly Action disposeAction;
 

src/OpenTelemetry/DiagnosticSourceInstrumentation/DiagnosticSourceListener.cs

@@ -21,7 +21,7 @@
 
 namespace OpenTelemetry.Instrumentation
 {
-    internal class DiagnosticSourceListener : IObserver<KeyValuePair<string, object>>
+    internal sealed class DiagnosticSourceListener : IObserver<KeyValuePair<string, object>>
     {
         private readonly ListenerHandler handler;
 

src/OpenTelemetry/DiagnosticSourceInstrumentation/InstrumentationEventSource.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Instrumentation
     /// EventSource events emitted from the project.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Instrumentation")]
-    internal class InstrumentationEventSource : EventSource
+    internal sealed class InstrumentationEventSource : EventSource
     {
         public static InstrumentationEventSource Log = new();
 

src/OpenTelemetry/DiagnosticSourceInstrumentation/PropertyFetcher.cs

@@ -25,7 +25,7 @@ namespace OpenTelemetry.Instrumentation
     /// PropertyFetcher fetches a property from an object.
     /// </summary>
     /// <typeparam name="T">The type of the property being fetched.</typeparam>
-    internal class PropertyFetcher<T>
+    internal sealed class PropertyFetcher<T>
     {
         private readonly string propertyName;
         private PropertyFetch innerFetcher;

src/OpenTelemetry/Internal/OpenTelemetrySdkEventSource.cs

@@ -29,7 +29,7 @@ namespace OpenTelemetry.Internal
     /// EventSource implementation for OpenTelemetry SDK implementation.
     /// </summary>
     [EventSource(Name = "OpenTelemetry-Sdk")]
-    internal class OpenTelemetrySdkEventSource : EventSource
+    internal sealed class OpenTelemetrySdkEventSource : EventSource
     {
         public static OpenTelemetrySdkEventSource Log = new();
 #if DEBUG

src/OpenTelemetry/Internal/SelfDiagnosticsConfigParser.cs

@@ -22,7 +22,7 @@
 
 namespace OpenTelemetry.Internal
 {
-    internal class SelfDiagnosticsConfigParser
+    internal sealed class SelfDiagnosticsConfigParser
     {
         public const string ConfigFileName = "OTEL_DIAGNOSTICS.json";
         private const int FileSizeLowerLimit = 1024;  // Lower limit for log file size in KB: 1MB

src/OpenTelemetry/Metrics/CompositeMetricReader.cs

@@ -179,7 +179,7 @@ public bool MoveNext()
             }
         }
 
-        internal class DoublyLinkedListNode
+        internal sealed class DoublyLinkedListNode
         {
             public readonly MetricReader Value;
 

src/OpenTelemetry/Metrics/ExponentialBucketHistogram.cs

@@ -26,7 +26,7 @@ namespace OpenTelemetry.Metrics;
 /// identified by <c>Bucket[index] = ( base ^ index, base ^ (index + 1) ]</c>,
 /// where <c>index</c> is an integer.
 /// </summary>
-internal class ExponentialBucketHistogram
+internal sealed class ExponentialBucketHistogram
 {
     private int scale;
     private double scalingFactor; // 2 ^ scale / log(2)

src/OpenTelemetry/Metrics/ExponentialBucketHistogramConfiguration.cs

@@ -19,7 +19,7 @@ namespace OpenTelemetry.Metrics;
 /// <summary>
 /// Stores configuration for a histogram metric stream with exponential bucket boundaries.
 /// </summary>
-internal class ExponentialBucketHistogramConfiguration : MetricStreamConfiguration
+internal sealed class ExponentialBucketHistogramConfiguration : MetricStreamConfiguration
 {
     /// <summary>
     /// Gets or sets the maximum number of buckets in each of the positive and negative ranges, not counting the special zero bucket.

src/OpenTelemetry/Metrics/StringArrayEqualityComparer.cs

@@ -19,7 +19,7 @@
 
 namespace OpenTelemetry.Metrics
 {
-    internal class StringArrayEqualityComparer : IEqualityComparer<string[]>
+    internal sealed class StringArrayEqualityComparer : IEqualityComparer<string[]>
     {
         public bool Equals(string[] strings1, string[] strings2)
         {

src/OpenTelemetry/Metrics/ThreadStaticStorage.cs

@@ -21,7 +21,7 @@
 
 namespace OpenTelemetry.Metrics
 {
-    internal class ThreadStaticStorage
+    internal sealed class ThreadStaticStorage
     {
         private const int MaxTagCacheSize = 8;
 
@@ -150,7 +150,7 @@ internal void CloneKeysAndValues(string[] inputTagKeys, object[] inputTagValues,
             }
         }
 
-        internal class TagStorage
+        internal sealed class TagStorage
         {
             // Used to split into Key sequence, Value sequence.
             internal readonly string[] TagKeys;