Enable CA1852 and fix warnings for it

.editorconfig

@@ -138,6 +138,9 @@ csharp_space_between_method_call_empty_parameter_list_parentheses = false
 csharp_preserve_single_line_statements = true
 csharp_preserve_single_line_blocks = true
 
+# Help Link: https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1852
+# Tags     : Telemetry, EnabledRuleInAggressiveMode, CompilationEnd
+dotnet_diagnostic.CA1852.severity = warning
 
 # IDE preferences
 dotnet_diagnostic.IDE0090.severity = silent # IDE0090: Use 'new(...)'

tests/BasicTest/Program.cs

@@ -34,7 +34,7 @@ public CustomConfig()
             AddJob(Configure(Job.Default.WithRuntime(CoreRuntime.Core50)));
         }
     }
-    internal class SlowConfig : CustomConfig
+    internal sealed class SlowConfig : CustomConfig
     {
         protected override Job Configure(Job j)
             => j.WithLaunchCount(1)

tests/StackExchange.Redis.Benchmarks/SlowConfig.cs

@@ -2,7 +2,7 @@
 
 namespace StackExchange.Redis.Benchmarks
 {
-    internal class SlowConfig : CustomConfig
+    internal sealed class SlowConfig : CustomConfig
     {
         protected override Job Configure(Job j)
             => j.WithLaunchCount(1)

tests/StackExchange.Redis.Tests/ConfigTests.cs

@@ -713,7 +713,7 @@ public void HttpTunnelCanRoundtrip(string input, string expected)
         Assert.Equal($"127.0.0.1:6380,tunnel={expected}", cs);
     }
 
-    private class CustomTunnel : Tunnel { }
+    private sealed class CustomTunnel : Tunnel { }
 
     [Fact]
     public void CustomTunnelCanRoundtripMinusTunnel()

tests/StackExchange.Redis.Tests/LoggerTests.cs

@@ -78,7 +78,7 @@ public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Except
     /// <summary>
     /// To save on test time, no reason to spin up n connections just to test n logging implementations...
     /// </summary>
-    private class TestMultiLogger(params ILogger[] loggers) : ILogger
+    private sealed class TestMultiLogger(params ILogger[] loggers) : ILogger
     {
 #if NET8_0_OR_GREATER
         public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
@@ -95,7 +95,7 @@ public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Except
         }
     }
 
-    private class TestLogger : ILogger
+    private sealed class TestLogger : ILogger
     {
         private readonly StringBuilder sb = new StringBuilder();
         private long _callCount;

tests/StackExchange.Redis.Tests/ParseTests.cs

@@ -79,7 +79,7 @@ private void ProcessMessages(Arena<RawResult> arena, ReadOnlySequence<byte> buff
         Assert.Equal(expected, found);
     }
 
-    private class FragmentedSegment<T> : ReadOnlySequenceSegment<T>
+    private sealed class FragmentedSegment<T> : ReadOnlySequenceSegment<T>
     {
         public FragmentedSegment(long runningIndex, ReadOnlyMemory<T> memory)
         {

tests/StackExchange.Redis.Tests/ProfilingTests.cs

@@ -204,14 +204,14 @@ public async Task ManyContexts()
         }
     }
 
-    internal class PerThreadProfiler
+    internal sealed class PerThreadProfiler
     {
         private readonly ThreadLocal<ProfilingSession> perThreadSession = new ThreadLocal<ProfilingSession>(() => new ProfilingSession());
 
         public ProfilingSession GetSession() => perThreadSession.Value!;
     }
 
-    internal class AsyncLocalProfiler
+    internal sealed class AsyncLocalProfiler
     {
         private readonly AsyncLocal<ProfilingSession> perThreadSession = new AsyncLocal<ProfilingSession>();