Fix runtime pack handling of profiles combined with no profiles

Fixes #43461

src/Tasks/Microsoft.NET.Build.Tasks/ResolveRuntimePackAssets.cs

@@ -31,14 +31,13 @@ protected override void ExecuteCore()
 
             // Find any RuntimeFrameworks that matches with FrameworkReferences, so that we can apply that RuntimeFrameworks profile to the corresponding RuntimePack.
             // This is done in 2 parts, First part (see comments for 2nd part further below), we match the RuntimeFramework with the FrameworkReference by using the following metadata.
-            // RuntimeFrameworks.GetMetadata("FrameworkName")==FrameworkReferences.ItemSpec AND RuntimeFrameworks.GetMetadata("Profile") is not empty
+            // RuntimeFrameworks.GetMetadata("FrameworkName")==FrameworkReferences.ItemSpec
             // For example, A WinForms app that uses useWindowsForms (and useWPF will be set to false) has the following values that will result in a match of the below RuntimeFramework.
             // FrameworkReferences with an ItemSpec "Microsoft.WindowsDesktop.App.WindowsForms" will match with 
             // RuntimeFramework with an ItemSpec => "Microsoft.WindowsDesktop.App", GetMetadata("FrameworkName") => "Microsoft.WindowsDesktop.App.WindowsForms", GetMetadata("Profile") => "WindowsForms"
             List<ITaskItem> matchingRuntimeFrameworks = RuntimeFrameworks != null ? FrameworkReferences
                     .SelectMany(fxReference => RuntimeFrameworks.Where(rtFx =>
-                        fxReference.ItemSpec.Equals(rtFx.GetMetadata(MetadataKeys.FrameworkName), StringComparison.OrdinalIgnoreCase) &&
-                        !string.IsNullOrEmpty(rtFx.GetMetadata("Profile"))))
+                        fxReference.ItemSpec.Equals(rtFx.GetMetadata(MetadataKeys.FrameworkName), StringComparison.OrdinalIgnoreCase)))
                         .ToList() : null;
 
             HashSet<string> frameworkReferenceNames = new(FrameworkReferences.Select(item => item.ItemSpec), StringComparer.OrdinalIgnoreCase);
@@ -93,6 +92,13 @@ protected override void ExecuteCore()
                     }
                 }
 
+                //  If we have a runtime framework with an empty profile, it means that we should use all of the contents of the runtime pack,
+                //  so we can clear the profile list
+                if (profiles.Contains(string.Empty))
+                {
+                    profiles.Clear();
+                }
+
                 string runtimePackRoot = runtimePack.GetMetadata(MetadataKeys.PackageDirectory);
 
                 if (string.IsNullOrEmpty(runtimePackRoot) || !Directory.Exists(runtimePackRoot))