diff --git a/samples/CSharp/OCCTProxy/OCCTProxy.vcxproj b/samples/CSharp/OCCTProxy/OCCTProxy.vcxproj
index 26b8d1e7a6..f5e71836ce 100644
--- a/samples/CSharp/OCCTProxy/OCCTProxy.vcxproj
+++ b/samples/CSharp/OCCTProxy/OCCTProxy.vcxproj
@@ -91,6 +91,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy.dll</OutputFile>
@@ -121,6 +122,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy.dll</OutputFile>
@@ -145,6 +147,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy.dll</OutputFile>
@@ -172,6 +175,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy.dll</OutputFile>
diff --git a/samples/CSharp/OCCTProxy_D3D/OCCTProxy_D3D.vcxproj b/samples/CSharp/OCCTProxy_D3D/OCCTProxy_D3D.vcxproj
index 78bac3cdef..c557b66c8d 100644
--- a/samples/CSharp/OCCTProxy_D3D/OCCTProxy_D3D.vcxproj
+++ b/samples/CSharp/OCCTProxy_D3D/OCCTProxy_D3D.vcxproj
@@ -92,6 +92,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy_D3D.dll</OutputFile>
@@ -123,6 +124,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy_D3D.dll</OutputFile>
@@ -147,6 +149,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy_D3D.dll</OutputFile>
@@ -174,6 +177,7 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <ConformanceMode>false</ConformanceMode>
     </ClCompile>
     <Link>
       <OutputFile>$(OutDir)OCCTProxy_D3D.dll</OutputFile>