C#: Add more test examples.

Author: michaelnebel

csharp/ql/test/library-tests/dataflow/flowsources/aspremote/AspRemoteFlowSource.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Mvc;
+using System;
 
 namespace Testing
 {
@@ -24,15 +25,24 @@ public object MyAction(ViewModel viewModel)
 
     public class AspRoutingEndpoints
     {
+        public delegate void MapGetHandler(string delegateparam);
+
+        public void HandlerMethod(string param) { }
+
         public void M1(string[] args)
         {
             var builder = WebApplication.CreateBuilder(args);
             var app = builder.Build();
 
             // The delegate parameters are considered flow sources.
             app.MapGet("/api/redirect/{newUrl}", (string newUrl) => { });
-            app.MapGet("/{myApi}/redirect/{myUrl}", (string myApi, string myUrl) => { } );
+            app.MapGet("/{myApi}/redirect/{myUrl}", (string myApi, string myUrl) => { });
+
+            Action<string> handler = (string lambdaParam) => { };
+            app.MapGet("/api/redirect/{lambdaParam}", handler);
 
+            MapGetHandler handler2 = HandlerMethod;
+            app.MapGet("/api/redirect/{param}", handler2);
             app.Run();
         }
     }

csharp/ql/test/library-tests/dataflow/flowsources/aspremote/aspRemoteFlowSource.expected

@@ -1,7 +1,9 @@
 remoteFlowSourceMembers
-| AspRemoteFlowSource.cs:9:23:9:31 | RequestId |
+| AspRemoteFlowSource.cs:10:23:10:31 | RequestId |
 remoteFlowSources
-| AspRemoteFlowSource.cs:19:42:19:50 | viewModel |
-| AspRemoteFlowSource.cs:33:58:33:63 | newUrl |
-| AspRemoteFlowSource.cs:34:61:34:65 | myApi |
-| AspRemoteFlowSource.cs:34:75:34:79 | myUrl |
+| AspRemoteFlowSource.cs:20:42:20:50 | viewModel |
+| AspRemoteFlowSource.cs:30:42:30:46 | param |
+| AspRemoteFlowSource.cs:38:58:38:63 | newUrl |
+| AspRemoteFlowSource.cs:39:61:39:65 | myApi |
+| AspRemoteFlowSource.cs:39:75:39:79 | myUrl |
+| AspRemoteFlowSource.cs:41:46:41:56 | lambdaParam |