Fix S6931 FN: Route starting with ~ character

analyzers/src/SonarAnalyzer.Common/Rules/AspNet/RouteTemplateShouldNotStartWithSlashBase.cs

@@ -66,7 +66,7 @@ private void ReportIssues(SonarSymbolReportingContext context, INamedTypeSymbol
         // 1. The controller does not have any actions defined
         // 2. At least one action is not annotated with a route attribute or is annotated with a parameterless attribute
         // 3. There is at least one action with a route template that does not start with '/'
-        if (!actions.Any() || actions.Any(x => !x.RouteParameters.Any() || x.RouteParameters.Values.Any(x => !x.StartsWith("/"))))
+        if (!actions.Any() || actions.Any(x => !x.RouteParameters.Any() || x.RouteParameters.Values.Any(x => !x.StartsWith("/") && !x.StartsWith("~/"))))
         {
             return;
         }

analyzers/tests/SonarAnalyzer.Test/TestCases/AspNet/RouteTemplateShouldNotStartWithSlash.AspNet4x.cs

@@ -193,3 +193,10 @@ public partial class PartialCompliantController : Controller // Compliant - its
     [Route("/[action]")]
     public ActionResult Index3() => View();
 }
+
+// https://github.com/SonarSource/sonar-dotnet/issues/9002
+public class Repro_9002 : Controller        // Noncompliant
+{
+    [Route("~/B")]                          // Secondary
+    public ActionResult Index() => View();
+}

analyzers/tests/SonarAnalyzer.Test/TestCases/AspNet/RouteTemplateShouldNotStartWithSlash.AspNetCore.cs

@@ -314,3 +314,10 @@ public partial class CompliantPartialAutogeneratedController : Controller // Com
     [Route("/SubPath/Index2")]
     public IActionResult Index2() => View();
 }
+
+// https://github.com/SonarSource/sonar-dotnet/issues/9002
+public class Repro_9002 : Controller            // Noncompliant
+{
+    [Route("~/B")]                              // Secondary
+    public IActionResult Index() => View();
+}

analyzers/tests/SonarAnalyzer.Test/TestCases/AspNet/RouteTemplateShouldNotStartWithSlash.AspNetCore.vb

@@ -312,3 +312,13 @@ Public Class ControllerRequirementsInfluenceActionsCheck
     End Class
 
 End Class
+
+' https://github.com/SonarSource/sonar-dotnet/issues/9002
+Public Class Repro_9002                     ' Noncompliant
+    Inherits Controller
+
+    <Route("~/B")>                          ' Secondary
+    Public Function Index() As ActionResult
+        Return View()
+    End Function
+End Class