NET-3376 Fix S6930 AD0001: Issue on template / code files for blazor

GitOrigin-RevId: 824736d883bc02f47c4c9de4fc606df6df9381cf

Author: alex-meseldzija-sonarsource

analyzers/src/SonarAnalyzer.Shared/Syntax/Extensions/MemberAccessExpressionSyntaxExtensionsShared.cs

@@ -23,7 +23,8 @@ namespace SonarAnalyzer.VisualBasic.Core.Syntax.Extensions;
 internal static class MemberAccessExpressionSyntaxExtensionsShared
 {
     public static bool IsPtrZero(this MemberAccessExpressionSyntax memberAccess, SemanticModel model) =>
-        memberAccess.Name.Identifier.Text == "Zero"
-        && model.GetTypeInfo(memberAccess).Type is var type
+        memberAccess.Name.Identifier.Text == nameof(IntPtr.Zero)
+        && memberAccess.EnsureCorrectSemanticModelOrDefault(model) is { } maModel
+        && maModel.GetTypeInfo(memberAccess).Type is var type
         && type.IsAny(KnownType.System_IntPtr, KnownType.System_UIntPtr);
 }

analyzers/tests/SonarAnalyzer.Test/Rules/AspNet/BackslashShouldBeAvoidedInAspNetRoutesTest.cs

@@ -141,6 +141,39 @@ private static IEnumerable<MetadataReference> AspNetCore2xReferences(string aspN
             AspNetCoreMetadataReference.MicrosoftAspNetCoreRouting,             // For IEndpointRouteBuilder
         ];
 
+    [TestMethod]
+    public void BackslashShouldBeAvoidedInAspNetRoutes_CrossFilePartialClass_DoesNotThrow() =>
+        builderCS
+            .AddReferences(AspNetCore3AndAboveReferences)
+            .AddSnippet("""
+                using System;
+
+                public partial class SomeComponent
+                {
+                    private TimeSpan _elapsedTime = TimeSpan.Zero;
+                }
+                """)
+            .AddSnippet("""
+                using Microsoft.AspNetCore.Mvc;
+                using System;
+
+                public class MyController : Controller
+                {
+                    public IActionResult Index() => View();
+                }
+
+                public partial class SomeComponent
+                {
+                    public void Process()
+                    {
+                        Use(_elapsedTime);
+                    }
+
+                    private void Use(object value) { }
+                }
+                """)
+            .VerifyNoIssues();
+
     [TestMethod]
     [DynamicData(nameof(AspNetCore2xVersionsUnderTest))]
     public void BackslashShouldBeAvoidedInAspNetRoutes_AspNetCore2x_CS(string aspNetCoreVersion) =>