[0.81]Visual studio 2026 strict check fix (#15602)

* visual studio 2026 strict check fix

* Change files

---------

Co-authored-by: Abhijeet Jha <74712637+iamAbhi-916@users.noreply.github.com>
Co-authored-by: Harini Malothu <hmalothu@microsoft.com>

Author: 3 people

change/react-native-windows-cbb96590-7b1d-4f6b-8247-775ec56bc1c3.json

@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "visual studio 2026 strict check fix",
+  "packageName": "react-native-windows",
+  "email": "hmalothu@microsoft.com",
+  "dependentChangeType": "none"
+}

vnext/Microsoft.ReactNative/Fabric/Composition/UiaHelpers.cpp

@@ -48,7 +48,8 @@ HRESULT UiaNavigateHelper(
         uint32_t index = children.Size() - 1;
         do {
           auto child = children.GetAt(index).as<winrt::Microsoft::ReactNative::implementation::ComponentView>();
-          if (uiaProvider = child->EnsureUiaProvider()) {
+          uiaProvider = child->EnsureUiaProvider();
+          if (uiaProvider) {
             break;
           }
         } while (index-- != 0);
@@ -60,7 +61,8 @@ HRESULT UiaNavigateHelper(
         uint32_t index = 0;
         do {
           auto child = children.GetAt(index).as<winrt::Microsoft::ReactNative::implementation::ComponentView>();
-          if (uiaProvider = child->EnsureUiaProvider()) {
+          uiaProvider = child->EnsureUiaProvider();
+          if (uiaProvider) {
             break;
           }
         } while (++index != children.Size());
@@ -74,7 +76,8 @@ HRESULT UiaNavigateHelper(
 
         while (++it != children.end()) {
           auto nextchild = (*it).as<winrt::Microsoft::ReactNative::implementation::ComponentView>();
-          if (uiaProvider = nextchild->EnsureUiaProvider()) {
+          uiaProvider = nextchild->EnsureUiaProvider();
+          if (uiaProvider) {
             break;
           }
         }
@@ -91,7 +94,8 @@ HRESULT UiaNavigateHelper(
           do {
             it--;
             auto prevchild = (*it).as<winrt::Microsoft::ReactNative::implementation::ComponentView>();
-            if (uiaProvider = prevchild->EnsureUiaProvider()) {
+            uiaProvider = prevchild->EnsureUiaProvider();
+            if (uiaProvider) {
               break;
             }
           } while (it != children.begin());

vnext/Mso/src/dispatchQueue/queueService.cpp

@@ -205,8 +205,10 @@ void QueueService::InvokeTask(
   DispatchTask taskToInvoke{std::move(task)};
   taskToInvoke.Get()->Invoke(); // Call Get()->Invoke instead of operator() to flatten call stack
 
-  while (taskToInvoke = context.TakeNextDeferredTask()) {
+  taskToInvoke = context.TakeNextDeferredTask();
+  while (taskToInvoke) {
     taskToInvoke.Get()->Invoke();
+    taskToInvoke = context.TakeNextDeferredTask();
   }
 }
 

vnext/Mso/src/dispatchQueue/uiScheduler_winrt.cpp

@@ -271,7 +271,8 @@ bool UISchedulerWinRT<TDispatcherTraits>::TryTakeTask(
     --m_taskCount;
   }
 
-  if (queue = m_queue.GetStrongPtr()) {
+  queue = m_queue.GetStrongPtr();
+  if (queue) {
     return queue->TryDequeTask(task);
   }
 

vnext/Shared/Networking/OriginPolicyHttpFilter.cpp

@@ -758,7 +758,8 @@ ResponseOperation OriginPolicyHttpFilter::SendRequestAsync(HttpRequestMessage co
     if (originPolicy == OriginPolicy::CrossOriginResourceSharing) {
       // If inner filter can AllowRedirect, disable for preflight.
       winrt::impl::com_ref<IHttpBaseProtocolFilter> baseFilter;
-      if (baseFilter = m_innerFilter.try_as<IHttpBaseProtocolFilter>()) {
+      baseFilter = m_innerFilter.try_as<IHttpBaseProtocolFilter>();
+      if (baseFilter) {
         baseFilter.AllowAutoRedirect(false);
       }