diff --git a/src/kiwano-audio/Transcoder.cpp b/src/kiwano-audio/Transcoder.cpp
index c2be5f8c..42e02539 100644
--- a/src/kiwano-audio/Transcoder.cpp
+++ b/src/kiwano-audio/Transcoder.cpp
@@ -74,9 +74,10 @@ HRESULT Transcoder::LoadMediaFile(const String& file_path)
 {
     HRESULT hr = S_OK;
 
-    ComPtr<IMFSourceReader> reader;
+    WideString path = strings::ToWide(file_path);
 
-    hr = dlls::MediaFoundation::Get().MFCreateSourceReaderFromURL(string::ToWide(file_path).c_str(), nullptr, &reader);
+    ComPtr<IMFSourceReader> reader;
+    hr = dlls::MediaFoundation::Get().MFCreateSourceReaderFromURL(path.c_str(), nullptr, &reader);
 
     if (SUCCEEDED(hr))
     {
diff --git a/src/kiwano/core/ObjectBase.cpp b/src/kiwano/core/ObjectBase.cpp
index 73774984..1e8be8e6 100644
--- a/src/kiwano/core/ObjectBase.cpp
+++ b/src/kiwano/core/ObjectBase.cpp
@@ -89,7 +89,7 @@ void ObjectBase::SetName(const String& name)
 
 String ObjectBase::DumpObject()
 {
-    return string::Format("{ class=\"%s\" id=%d refcount=%d name=\"%s\" }", typeid(*this).name(), GetObjectID(),
+    return strings::Format("{ class=\"%s\" id=%d refcount=%d name=\"%s\" }", typeid(*this).name(), GetObjectID(),
                           GetRefCount(), GetName().c_str());
 }
 
diff --git a/src/kiwano/core/String.cpp b/src/kiwano/core/String.cpp
index 896d32d1..04948cc6 100644
--- a/src/kiwano/core/String.cpp
+++ b/src/kiwano/core/String.cpp
@@ -24,7 +24,7 @@
 
 namespace kiwano
 {
-namespace string
+namespace strings
 {
 
 #if defined(KGE_PLATFORM_WINDOWS)
diff --git a/src/kiwano/core/String.h b/src/kiwano/core/String.h
index ef8c91f0..83103ee4 100644
--- a/src/kiwano/core/String.h
+++ b/src/kiwano/core/String.h
@@ -32,7 +32,7 @@ using String = std::string;
 /// @brief 宽字符串容器
 using WideString = std::wstring;
 
-namespace string
+namespace strings
 {
 
 /// \~chinese
diff --git a/src/kiwano/platform/win32/WindowImpl.cpp b/src/kiwano/platform/win32/WindowImpl.cpp
index 543dd238..1f15f5f3 100644
--- a/src/kiwano/platform/win32/WindowImpl.cpp
+++ b/src/kiwano/platform/win32/WindowImpl.cpp
@@ -278,7 +278,7 @@ void WindowWin32Impl::Init(const String& title, uint32_t width, uint32_t height,
         height = win_height;
     }
 
-    WideString wide_title = string::ToWide(title);
+    WideString wide_title = strings::ToWide(title);
 
     handle_ = ::CreateWindowExW(is_fullscreen_ ? WS_EX_TOPMOST : 0, L"KiwanoAppWnd", wide_title.c_str(), GetStyle(),
                                 left, top, width, height, nullptr, nullptr, hinst, nullptr);
@@ -321,7 +321,7 @@ void WindowWin32Impl::SetTitle(const String& title)
 {
     if (handle_)
     {
-        WideString wide_title = string::ToWide(title);
+        WideString wide_title = strings::ToWide(title);
         ::SetWindowTextW(handle_, wide_title.c_str());
     }
 }
@@ -630,7 +630,7 @@ LRESULT WindowWin32Impl::MessageProc(HWND hwnd, UINT32 msg, WPARAM wparam, LPARA
     {
         KGE_SYS_LOG("Window title changed");
 
-        this->title_ = string::ToNarrow(reinterpret_cast<LPCWSTR>(lparam));
+        this->title_ = strings::ToNarrow(reinterpret_cast<LPCWSTR>(lparam));
 
         WindowTitleChangedEventPtr evt = new WindowTitleChangedEvent;
         evt->title                     = this->title_;
diff --git a/src/kiwano/render/DirectX/FontCollectionLoader.cpp b/src/kiwano/render/DirectX/FontCollectionLoader.cpp
index d3f94e8e..3c0fb0c9 100644
--- a/src/kiwano/render/DirectX/FontCollectionLoader.cpp
+++ b/src/kiwano/render/DirectX/FontCollectionLoader.cpp
@@ -305,7 +305,7 @@ HRESULT STDMETHODCALLTYPE FontFileEnumerator::MoveNext(_Out_ BOOL* hasCurrentFil
 
     if (nextIndex_ < filePaths_.size())
     {
-        WideString file_name = string::ToWide(filePaths_[nextIndex_]);
+        WideString file_name = strings::ToWide(filePaths_[nextIndex_]);
 
         hr = pFactory_->CreateFontFileReference(file_name.c_str(), NULL, &currentFile_);
 
diff --git a/src/kiwano/render/DirectX/RendererImpl.cpp b/src/kiwano/render/DirectX/RendererImpl.cpp
index efb0198f..1f4e8042 100644
--- a/src/kiwano/render/DirectX/RendererImpl.cpp
+++ b/src/kiwano/render/DirectX/RendererImpl.cpp
@@ -168,7 +168,7 @@ void RendererImpl::CreateTexture(Texture& texture, const String& file_path)
 
     if (SUCCEEDED(hr))
     {
-        WideString full_path = string::ToWide(FileSystem::GetInstance().GetFullPathForFile(file_path));
+        WideString full_path = strings::ToWide(FileSystem::GetInstance().GetFullPathForFile(file_path));
 
         ComPtr<IWICBitmapDecoder> decoder;
         hr = d2d_res_->CreateBitmapDecoderFromFile(decoder, full_path.c_str());
@@ -279,7 +279,7 @@ void RendererImpl::CreateGifImage(GifImage& gif, const String& file_path)
 
     if (SUCCEEDED(hr))
     {
-        WideString full_path = string::ToWide(FileSystem::GetInstance().GetFullPathForFile(file_path));
+        WideString full_path = strings::ToWide(FileSystem::GetInstance().GetFullPathForFile(file_path));
 
         ComPtr<IWICBitmapDecoder> decoder;
         hr = d2d_res_->CreateBitmapDecoderFromFile(decoder, full_path.c_str());
@@ -581,7 +581,7 @@ void RendererImpl::CreateTextLayout(TextLayout& layout, const String& content, c
 
     if (SUCCEEDED(hr))
     {
-        WideString         font_family = style.font_family.empty() ? L"" : string::ToWide(style.font_family);
+        WideString         font_family = style.font_family.empty() ? L"" : strings::ToWide(style.font_family);
         DWRITE_FONT_WEIGHT font_weight = DWRITE_FONT_WEIGHT(style.font_weight);
         DWRITE_FONT_STYLE  font_style  = style.italic ? DWRITE_FONT_STYLE_ITALIC : DWRITE_FONT_STYLE_NORMAL;
         auto               collection  = NativePtr::Get<IDWriteFontCollection>(style.font);
@@ -592,7 +592,7 @@ void RendererImpl::CreateTextLayout(TextLayout& layout, const String& content, c
 
         if (SUCCEEDED(hr))
         {
-            WideString wide = string::ToWide(content);
+            WideString wide = strings::ToWide(content);
 
             ComPtr<IDWriteTextLayout> output;
             hr = d2d_res_->CreateTextLayout(output, wide.c_str(), wide.length(), format);
diff --git a/src/kiwano/render/TextLayout.cpp b/src/kiwano/render/TextLayout.cpp
index 08ddecbb..210e1d2a 100644
--- a/src/kiwano/render/TextLayout.cpp
+++ b/src/kiwano/render/TextLayout.cpp
@@ -127,7 +127,7 @@ void TextLayout::SetFontFamily(const String& family, TextRange range)
 
     if (native)
     {
-        WideString font_family = family.empty() ? L"" : string::ToWide(family);
+        WideString font_family = family.empty() ? L"" : strings::ToWide(family);
 
         HRESULT hr = native->SetFontFamilyName(font_family.c_str(), { range.start, range.length });
         KGE_THROW_IF_FAILED(hr, "IDWriteTextLayout::SetFontFamilyName failed");