From e38f0367ac84d3c140354f2a6bfdf7f8b214e63c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 10 Jan 2026 03:10:24 +0000
Subject: [PATCH 1/2] Initial plan


From b4673c9ddb8078c41157b41fdf1e146a5beabf57 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 10 Jan 2026 03:17:18 +0000
Subject: [PATCH 2/2] Fix MA0182 to detect pointer type usages in method
 parameters

Co-authored-by: meziantou <509220+meziantou@users.noreply.github.com>
---
 .../Rules/AvoidUnusedInternalTypesAnalyzer.cs |  6 ++++
 .../AvoidUnusedInternalTypesAnalyzerTests.cs  | 29 +++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/src/Meziantou.Analyzer/Rules/AvoidUnusedInternalTypesAnalyzer.cs b/src/Meziantou.Analyzer/Rules/AvoidUnusedInternalTypesAnalyzer.cs
index cc00cbf56..cc1e05a6e 100644
--- a/src/Meziantou.Analyzer/Rules/AvoidUnusedInternalTypesAnalyzer.cs
+++ b/src/Meziantou.Analyzer/Rules/AvoidUnusedInternalTypesAnalyzer.cs
@@ -260,6 +260,12 @@ private void AddUsedType(ITypeSymbol typeSymbol)
                     AddUsedType(arrayTypeSymbol.ElementType);
                 }
 
+                // Handle pointer types
+                if (typeSymbol is IPointerTypeSymbol pointerTypeSymbol)
+                {
+                    AddUsedType(pointerTypeSymbol.PointedAtType);
+                }
+
                 // Handle generic type arguments
                 if (typeSymbol is INamedTypeSymbol namedTypeSymbol)
                 {
diff --git a/tests/Meziantou.Analyzer.Test/Rules/AvoidUnusedInternalTypesAnalyzerTests.cs b/tests/Meziantou.Analyzer.Test/Rules/AvoidUnusedInternalTypesAnalyzerTests.cs
index 8d99e5266..6c5baf8d3 100644
--- a/tests/Meziantou.Analyzer.Test/Rules/AvoidUnusedInternalTypesAnalyzerTests.cs
+++ b/tests/Meziantou.Analyzer.Test/Rules/AvoidUnusedInternalTypesAnalyzerTests.cs
@@ -1370,4 +1370,33 @@ await CreateProjectBuilder()
               .WithSourceCode(SourceCode)
               .ValidateAsync();
     }
+
+    [Fact]
+    public async Task InternalStructUsedAsPointerInMethodParameter_NoDiagnostic()
+    {
+        const string SourceCode = """
+            using System;
+
+            internal struct SECURITY_ATTRIBUTES
+            {
+                internal uint nLength;
+                internal IntPtr lpSecurityDescriptor;
+                internal bool bInheritHandle;
+            }
+
+            public class FileOperations
+            {
+                private static unsafe void CreateFilePrivate(
+                    string lpFileName,
+                    int dwDesiredAccess,
+                    int dwShareMode,
+                    SECURITY_ATTRIBUTES* lpSecurityAttributes)
+                {
+                }
+            }
+            """;
+        await CreateProjectBuilder()
+              .WithSourceCode(SourceCode)
+              .ValidateAsync();
+    }
 }