diff --git a/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll b/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll
index 19962a1..488f3e6 100644
Binary files a/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll and b/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll differ
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/Device.cpp b/Plugins/uDesktopDuplication/uDesktopDuplication/Device.cpp
new file mode 100644
index 0000000..87c2847
--- /dev/null
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/Device.cpp
@@ -0,0 +1,96 @@
+#pragma once
+
+#include <queue>
+#include <d3d11.h>
+
+#include "IUnityInterface.h"
+#include "IUnityGraphicsD3D11.h"
+#include "Device.h"
+#include "Debug.h"
+
+#pragma comment(lib, "d3d11.lib")
+
+using namespace Microsoft::WRL;
+
+
+
+IsolatedD3D11Device::IsolatedD3D11Device()
+{
+}
+
+
+IsolatedD3D11Device::~IsolatedD3D11Device()
+{
+}
+
+
+HRESULT IsolatedD3D11Device::Create(const ComPtr<IDXGIAdapter>& adapter)
+{
+    const auto driverType = adapter ? 
+        D3D_DRIVER_TYPE_UNKNOWN : 
+        D3D_DRIVER_TYPE_HARDWARE;
+    const auto flags =
+        D3D11_CREATE_DEVICE_BGRA_SUPPORT;       // D2D Compatible
+        // | D3D11_CREATE_DEVICE_VIDEO_SUPPORT  // MediaFoundation
+    const D3D_FEATURE_LEVEL featureLevelsRequested[] = 
+    {
+        D3D_FEATURE_LEVEL_11_0, 
+        D3D_FEATURE_LEVEL_10_1,
+        D3D_FEATURE_LEVEL_10_0, 
+        D3D_FEATURE_LEVEL_9_3,
+        D3D_FEATURE_LEVEL_9_2, 
+        D3D_FEATURE_LEVEL_9_1 
+    };
+    const UINT numLevelsRequested = sizeof(featureLevelsRequested) / sizeof(D3D_FEATURE_LEVEL);
+    D3D_FEATURE_LEVEL featureLevelsSupported;
+
+    return D3D11CreateDevice(
+        adapter.Get(),
+        driverType,
+        nullptr,
+        flags,
+        featureLevelsRequested,
+        numLevelsRequested,
+        D3D11_SDK_VERSION,
+        &device_,
+        &featureLevelsSupported,
+        nullptr);
+}
+
+
+ComPtr<ID3D11Device> IsolatedD3D11Device::GetDevice()
+{ 
+    return device_;
+}
+
+
+ComPtr<ID3D11Texture2D> IsolatedD3D11Device::GetCompatibleSharedTexture(const ComPtr<ID3D11Texture2D>& src)
+{
+    D3D11_TEXTURE2D_DESC srcDesc;
+    src->GetDesc(&srcDesc);
+
+    // check if the format and size of the current texture are same as the source one
+    if (cachedTexture_) 
+    {
+        D3D11_TEXTURE2D_DESC targetDesc;
+        cachedTexture_->GetDesc(&targetDesc);
+        if (targetDesc.Format == srcDesc.Format && 
+            targetDesc.Width  == srcDesc.Width  && 
+            targetDesc.Height == srcDesc.Height)
+        {
+            return cachedTexture_;
+        }
+        cachedTexture_ = nullptr;
+    }
+
+    // for sharing this texture with unity device
+    srcDesc.MiscFlags = D3D11_RESOURCE_MISC_SHARED;
+
+    if (FAILED(device_->CreateTexture2D(&srcDesc, nullptr, &cachedTexture_)))
+    {
+        Debug::Error("IsolatedD3D11Device::GetCompatibleSharedTexture() => Creating shared texture failed.");
+        return nullptr;
+    }
+
+    return cachedTexture_;
+}
\ No newline at end of file
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/Device.h b/Plugins/uDesktopDuplication/uDesktopDuplication/Device.h
new file mode 100644
index 0000000..4b6af1e
--- /dev/null
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/Device.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <d3d11.h>
+#include <wrl/client.h>
+
+
+// Thraed safe self created ID3D11Device from specified adapter
+class IsolatedD3D11Device
+{
+public:
+    IsolatedD3D11Device();
+    ~IsolatedD3D11Device();
+
+    HRESULT Create(const Microsoft::WRL::ComPtr<IDXGIAdapter>& adapter);
+    Microsoft::WRL::ComPtr<ID3D11Device> GetDevice();
+    Microsoft::WRL::ComPtr<ID3D11Texture2D> GetCompatibleSharedTexture(
+        const Microsoft::WRL::ComPtr<ID3D11Texture2D>& src);
+
+private:
+    Microsoft::WRL::ComPtr<ID3D11Device> device_;
+    Microsoft::WRL::ComPtr<ID3D11Texture2D> cachedTexture_;
+};
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp b/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
index cd26c6b..99763e4 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/Monitor.cpp
@@ -1,85 +1,15 @@
 #include <d3d11.h>
 #include <ShellScalingAPI.h>
 #include <queue>
+#include "Monitor.h"
 #include "Debug.h"
 #include "Cursor.h"
 #include "MonitorManager.h"
-#include "Monitor.h"
-
-#pragma comment(lib, "d3d11.lib")
+#include "Device.h"
 
 using namespace Microsoft::WRL;
 
 
-///
-/// Thraed safe self created ID3D11Device from specified adapter
-///
-class IsolatedD3D11Device
-{
-	ComPtr<ID3D11Device> m_device;
-	ComPtr<ID3D11Texture2D> m_copyTarget;
-
-public:
-	ComPtr<ID3D11Device> GetDevice()const { return m_device; }
-
-	bool CreateDevice(const ComPtr<IDXGIAdapter> &adapter)
-	{
-		UINT flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT // D2D Compatible
-													  //| D3D11_CREATE_DEVICE_SINGLETHREADED
-													  //| D3D11_CREATE_DEVICE_VIDEO_SUPPORT // MediaFoundation
-			;
-
-		D3D_FEATURE_LEVEL FeatureLevelsRequested[6] = {
-			D3D_FEATURE_LEVEL_11_0, D3D_FEATURE_LEVEL_10_1,
-			D3D_FEATURE_LEVEL_10_0, D3D_FEATURE_LEVEL_9_3,
-			D3D_FEATURE_LEVEL_9_2, D3D_FEATURE_LEVEL_9_1 };
-
-		UINT               numLevelsRequested = sizeof(FeatureLevelsRequested) / sizeof(D3D_FEATURE_LEVEL);
-		D3D_FEATURE_LEVEL  FeatureLevelsSupported;
-
-		if (FAILED(D3D11CreateDevice(adapter.Get()
-			, adapter ? D3D_DRIVER_TYPE_UNKNOWN : D3D_DRIVER_TYPE_HARDWARE, nullptr
-			, flags
-			, FeatureLevelsRequested, numLevelsRequested
-			, D3D11_SDK_VERSION
-			, &m_device
-			, &FeatureLevelsSupported
-			, nullptr
-		))) {
-			return false;
-		}
-		return true;
-	}
-
-	ComPtr<ID3D11Texture2D> CreateCopyTargetWithSharedFlag(const ComPtr<ID3D11Texture2D> &src)
-	{
-		D3D11_TEXTURE2D_DESC desc;
-		src->GetDesc(&desc);
-
-		if (m_copyTarget) {
-			D3D11_TEXTURE2D_DESC target_desc;
-			m_copyTarget->GetDesc(&target_desc);
-			if (
-				target_desc.Format == desc.Format
-				&& target_desc.Width == desc.Width
-				&& target_desc.Height == desc.Height
-				) {
-				// already created
-				return m_copyTarget;
-			}
-		}
-
-		//desc.BindFlags |= D3D11_BIND_SHADER_RESOURCE; 
-		desc.MiscFlags = D3D11_RESOURCE_MISC_SHARED; // for share texture with unity device
-
-		if (FAILED(m_device->CreateTexture2D(&desc, NULL, &m_copyTarget)))
-		{
-			return nullptr;
-		}
-		return m_copyTarget;
-	}
-};
-
 
 struct QueueItem
 {
@@ -151,7 +81,9 @@ void Monitor::Initialize(
 	m_pIsolated = std::make_shared<IsolatedD3D11Device>();
 	m_textureQueue = std::make_shared<TextureQueue>();
 
-	if (!m_pIsolated->CreateDevice(adapter)) {
+	if (FAILED(m_pIsolated->Create(adapter)))
+    {
+		Debug::Error("Monitor::Initialize() => IsolatedD3D11Device::Create() failed.");
 		return;
 	}
 
@@ -535,7 +467,7 @@ void Monitor::DuplicateAndCopyLoop()
         }
 
         // copy target
-        auto copyTarget = m_pIsolated->CreateCopyTargetWithSharedFlag(texture);
+        auto copyTarget = m_pIsolated->GetCompatibleSharedTexture(texture);
         if (!copyTarget) {
             return;
         }
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj b/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj
index 637e1d4..df33c95 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj
@@ -141,6 +141,7 @@ copy /Y "$(SolutionDir)$(Platform)\$(Configuration)\$(TargetName).pdb" "$(Soluti
   <ItemGroup>
     <ClCompile Include="Common.cpp" />
     <ClCompile Include="Debug.cpp" />
+    <ClCompile Include="Device.cpp" />
     <ClCompile Include="MonitorManager.cpp" />
     <ClCompile Include="Main.cpp" />
     <ClCompile Include="Monitor.cpp" />
@@ -149,6 +150,7 @@ copy /Y "$(SolutionDir)$(Platform)\$(Configuration)\$(TargetName).pdb" "$(Soluti
   <ItemGroup>
     <ClInclude Include="Common.h" />
     <ClInclude Include="Debug.h" />
+    <ClInclude Include="Device.h" />
     <ClInclude Include="MonitorManager.h" />
     <ClInclude Include="include\IUnityGraphics.h" />
     <ClInclude Include="include\IUnityGraphicsD3D11.h" />
diff --git a/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj.filters b/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj.filters
index 48179e2..eb8cef5 100644
--- a/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj.filters
+++ b/Plugins/uDesktopDuplication/uDesktopDuplication/uDesktopDuplication.vcxproj.filters
@@ -20,6 +20,7 @@
     <ClInclude Include="Common.h" />
     <ClInclude Include="MonitorManager.h" />
     <ClInclude Include="Debug.h" />
+    <ClInclude Include="Device.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Monitor.cpp" />
@@ -28,5 +29,6 @@
     <ClCompile Include="MonitorManager.cpp" />
     <ClCompile Include="Common.cpp" />
     <ClCompile Include="Debug.cpp" />
+    <ClCompile Include="Device.cpp" />
   </ItemGroup>
 </Project>
\ No newline at end of file