diff --git a/CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzer.cs b/CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzer.cs
index 84d023c..32d74a4 100644
--- a/CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzer.cs
+++ b/CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzer.cs
@@ -515,6 +515,9 @@ bool IsAllowableDiscard()
                 case SyntaxKind.ParenthesizedLambdaExpression:
                 case SyntaxKind.SimpleLambdaExpression:
                     return "_".Equals(parameterNode.Identifier.ValueText, StringComparison.OrdinalIgnoreCase);
+                case SyntaxKind.ParameterList:
+                    return parameterNode.Parent.Parent?.IsKind(SyntaxKind.ParenthesizedLambdaExpression) == true
+                        && "_".Equals(parameterNode.Identifier.ValueText, StringComparison.OrdinalIgnoreCase);
                 default:
                     return false;
             }
diff --git a/UnitTests/UnitTests.CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzerTests.cs b/UnitTests/UnitTests.CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzerTests.cs
index 4d29d47..08ca5a7 100644
--- a/UnitTests/UnitTests.CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzerTests.cs
+++ b/UnitTests/UnitTests.CodeTiger.CodeAnalysis/Analyzers/Naming/SymbolNamingAnalyzerTests.cs
@@ -1041,6 +1041,9 @@ public void DoSomething()
                     {
                         var dictionary = new ConcurrentDictionary<int, string>();
                         dictionary.GetOrAdd(0, _ => "0");
+                        dictionary.GetOrAdd(0, (_) => "0");
+                        Action<object> action = _ => { };
+                        Func<string, bool> func = (_) => true;
                     }
                 }
             }
@@ -1050,7 +1053,7 @@ public void DoSomething()
     }
 
     [Fact]
-    public void ParameterWithDiscardNamesWhereNotAllowedProduceDiagnostics()
+    public void ParametersWithDiscardNamesWhereNotAllowedProduceDiagnostics()
     {
         string code = """
             using System;