Fix analyzer RCS1194

ChangeLog.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Fix analyzer [RCS1194](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1194) ([PR](https://github.com/dotnet/roslynator/pull/1733))
+
 ## [4.15.0] - 2025-12-14
 
 ### Added

src/Analyzers/CSharp/Analysis/ImplementExceptionConstructorsAnalyzer.cs

@@ -67,6 +67,11 @@ private static void AnalyzeNamedType(SymbolAnalysisContext context, INamedTypeSy
 
         var classDeclaration = (ClassDeclarationSyntax)symbol.GetSyntax(context.CancellationToken);
 
+#if ROSLYN_4_0
+        if (classDeclaration.ParameterList is not null)
+            return;
+#endif
+
         DiagnosticHelpers.ReportDiagnostic(context, DiagnosticRules.ImplementExceptionConstructors, classDeclaration.Identifier);
     }
 

src/Tests/Analyzers.Tests/RCS1194ImplementExceptionConstructorsTests.cs

@@ -38,6 +38,16 @@ public C(string message, Exception innerException) : base(message, innerExceptio
     {
     }
 }
+");
+    }
+
+    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.ImplementExceptionConstructors)]
+    public async Task Test_PrimaryConstructor()
+    {
+        await VerifyNoDiagnosticAsync(@"
+using System;
+
+class MyException (string message) : Exception(message);
 ");
     }
 }