S3884: Add UTs for Alias any type

analyzers/tests/SonarAnalyzer.UnitTest/Rules/SecurityPInvokeMethodShouldNotBeCalledTest.cs

@@ -38,6 +38,10 @@ public void SecurityPInvokeMethodShouldNotBeCalled_CS() =>
         public void SecurityPInvokeMethodShouldNotBeCalled_CSharp11() =>
             builderCS.AddPaths("SecurityPInvokeMethodShouldNotBeCalled.CSharp11.cs").WithOptions(ParseOptionsHelper.FromCSharp11).Verify();
 
+        [TestMethod]
+        public void SecurityPInvokeMethodShouldNotBeCalled_CSharp12() =>
+            builderCS.AddPaths("SecurityPInvokeMethodShouldNotBeCalled.CSharp12.cs").WithOptions(ParseOptionsHelper.FromCSharp12).Verify();
+
 #endif
 
         [TestMethod]

analyzers/tests/SonarAnalyzer.UnitTest/TestCases/SecurityPInvokeMethodShouldNotBeCalled.CSharp12.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Runtime.InteropServices;
+using IntPtrAliasFromKeywork = nint;
+
+class AliasAnyType
+{
+    [DllImport("OlE32.dll")]
+    static extern int CoSetProxyBlanket(
+        [MarshalAs(UnmanagedType.IUnknown)] object pProxy,
+        uint dwAuthnSvc,
+        uint dwAuthzSvc,
+        [MarshalAs(UnmanagedType.LPWStr)] string pServerPrincName,
+        uint dwAuthnLevel,
+        IntPtrAliasFromKeywork dwImpLevel,
+        IntPtrAliasFromKeywork pAuthInfo,
+        uint dwCapabilities);
+
+    void Test()
+    {
+        _ = CoSetProxyBlanket(null, 0, 0, null, 0, 0, 0, 0); // Noncompliant
+        //  ^^^^^^^^^^^^^^^^^
+    }
+}