diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 6893c00aa3..f6252b90aa 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -467,7 +467,10 @@ if (onnxruntime_USE_JEMALLOC)
   list(APPEND onnxruntime_EXTERNAL_DEPENDENCIES jemalloc)
 endif()
 
-include_directories(${ONNXRUNTIME_INCLUDE_DIR})
+include_directories(
+  ${ONNXRUNTIME_INCLUDE_DIR} 
+  ${REPO_ROOT}/include/onnxruntime/core/session
+)
 
 if (onnxruntime_USE_MKLDNN OR onnxruntime_USE_MKLML)
   include(mkldnn)
diff --git a/csharp/src/Microsoft.ML.OnnxRuntime/Microsoft.ML.OnnxRuntime.csproj b/csharp/src/Microsoft.ML.OnnxRuntime/Microsoft.ML.OnnxRuntime.csproj
index bffa46e623..f7fbdcda28 100644
--- a/csharp/src/Microsoft.ML.OnnxRuntime/Microsoft.ML.OnnxRuntime.csproj
+++ b/csharp/src/Microsoft.ML.OnnxRuntime/Microsoft.ML.OnnxRuntime.csproj
@@ -46,6 +46,18 @@
           CopyToOutputDirectory="Never"
           Visible="false"
     />
+    <None Include="$(OnnxRuntimeCsharpRoot)\..\include\onnxruntime\core\providers\cpu\cpu_provider_factory.h"
+          PackagePath="\build\native\include"
+          Pack="true"
+          CopyToOutputDirectory="Never"
+          Visible="false"
+    />
+    <None Include="$(OnnxRuntimeCsharpRoot)\..\include\onnxruntime\core\providers\cuda\cuda_provider_factory.h"
+          PackagePath="\build\native\include"
+          Pack="true"
+          CopyToOutputDirectory="Never"
+          Visible="false"
+    />
     <None Include="$(NativeBuildOutputDir)\onnxruntime.lib"
           PackagePath="\runtimes\win-$(TargetArchitecture)\native"
           Pack="true"
diff --git a/include/onnxruntime/core/providers/cpu/cpu_provider_factory.h b/include/onnxruntime/core/providers/cpu/cpu_provider_factory.h
index 360de99b5c..66f258922c 100644
--- a/include/onnxruntime/core/providers/cpu/cpu_provider_factory.h
+++ b/include/onnxruntime/core/providers/cpu/cpu_provider_factory.h
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-#include "core/session/onnxruntime_c_api.h"
+#include "onnxruntime_c_api.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/onnxruntime/core/providers/cuda/cuda_provider_factory.h b/include/onnxruntime/core/providers/cuda/cuda_provider_factory.h
index 3fc4b7b51f..81b5477b3c 100644
--- a/include/onnxruntime/core/providers/cuda/cuda_provider_factory.h
+++ b/include/onnxruntime/core/providers/cuda/cuda_provider_factory.h
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-#include "core/session/onnxruntime_c_api.h"
+#include "onnxruntime_c_api.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/onnxruntime/core/providers/mkldnn/mkldnn_provider_factory.h b/include/onnxruntime/core/providers/mkldnn/mkldnn_provider_factory.h
index 03ef1158ee..a54b522d9e 100644
--- a/include/onnxruntime/core/providers/mkldnn/mkldnn_provider_factory.h
+++ b/include/onnxruntime/core/providers/mkldnn/mkldnn_provider_factory.h
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-#include "core/session/onnxruntime_c_api.h"
+#include "onnxruntime_c_api.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/onnxruntime/core/providers/ngraph/ngraph_provider_factory.h b/include/onnxruntime/core/providers/ngraph/ngraph_provider_factory.h
index 0970362a2b..87d98cdbdd 100644
--- a/include/onnxruntime/core/providers/ngraph/ngraph_provider_factory.h
+++ b/include/onnxruntime/core/providers/ngraph/ngraph_provider_factory.h
@@ -1,7 +1,7 @@
 // Copyright(C) 2019 Intel Corporation
 // Licensed under the MIT License
 
-#include "core/session/onnxruntime_c_api.h"
+#include "onnxruntime_c_api.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/onnxruntime/core/providers/nnapi/nnapi_provider_factory.h b/include/onnxruntime/core/providers/nnapi/nnapi_provider_factory.h
index 0ad7e17b80..d8b6a1ec27 100644
--- a/include/onnxruntime/core/providers/nnapi/nnapi_provider_factory.h
+++ b/include/onnxruntime/core/providers/nnapi/nnapi_provider_factory.h
@@ -1,6 +1,6 @@
 // Copyright 2019 JD.com Inc. JD AI
 
-#include "core/session/onnxruntime_c_api.h"
+#include "onnxruntime_c_api.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/onnxruntime/core/providers/openvino/openvino_provider_factory.h b/include/onnxruntime/core/providers/openvino/openvino_provider_factory.h
index eadcd45603..08200319c7 100644
--- a/include/onnxruntime/core/providers/openvino/openvino_provider_factory.h
+++ b/include/onnxruntime/core/providers/openvino/openvino_provider_factory.h
@@ -1,7 +1,7 @@
 // Copyright(C) 2019 Intel Corporation
 // Licensed under the MIT License
 
-#include "core/session/onnxruntime_c_api.h"
+#include "onnxruntime_c_api.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.h b/include/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.h
index bee1ae1b09..fb077fc5ff 100644
--- a/include/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.h
+++ b/include/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.h
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-#include "core/session/onnxruntime_c_api.h"
+#include "onnxruntime_c_api.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/tools/ci_build/github/azure-pipelines/templates/c-api-artifacts-package-and-publish-steps-windows.yml b/tools/ci_build/github/azure-pipelines/templates/c-api-artifacts-package-and-publish-steps-windows.yml
index 807e6246f7..503bb05955 100644
--- a/tools/ci_build/github/azure-pipelines/templates/c-api-artifacts-package-and-publish-steps-windows.yml
+++ b/tools/ci_build/github/azure-pipelines/templates/c-api-artifacts-package-and-publish-steps-windows.yml
@@ -12,11 +12,15 @@ steps:
           mkdir $(Build.BinariesDirectory)\${{parameters.artifactName}}
           mkdir $(Build.BinariesDirectory)\${{parameters.artifactName}}\lib
           mkdir $(Build.BinariesDirectory)\${{parameters.artifactName}}\include
+
           echo "Directories created"            
           copy $(Build.BinariesDirectory)\${{parameters.buildConfig}}\${{parameters.buildConfig}}\onnxruntime.dll $(Build.BinariesDirectory)\${{parameters.artifactName}}\lib
           copy $(Build.BinariesDirectory)\${{parameters.buildConfig}}\${{parameters.buildConfig}}\onnxruntime.pdb $(Build.BinariesDirectory)\${{parameters.artifactName}}\lib
           copy $(Build.BinariesDirectory)\${{parameters.buildConfig}}\${{parameters.buildConfig}}\onnxruntime.lib $(Build.BinariesDirectory)\${{parameters.artifactName}}\lib
           copy $(Build.SourcesDirectory)\include\onnxruntime\core\session\onnxruntime_*.h  $(Build.BinariesDirectory)\${{parameters.artifactName}}\include
+          copy $(Build.SourcesDirectory)\include\onnxruntime\core\providers\cpu\cpu_provider_factory.h  $(Build.BinariesDirectory)\${{parameters.artifactName}}\include
+          copy $(Build.SourcesDirectory)\include\onnxruntime\core\providers\cuda\cuda_provider_factory.h  $(Build.BinariesDirectory)\${{parameters.artifactName}}\include
+
           # copy the README, licence and TPN
           copy $(Build.SourcesDirectory)\README.md $(Build.BinariesDirectory)\${{parameters.artifactName}}\README.md
           copy $(Build.SourcesDirectory)\docs\C_API.md $(Build.BinariesDirectory)\${{parameters.artifactName}}\C_API.md
diff --git a/tools/ci_build/github/linux/copy_strip_binary.sh b/tools/ci_build/github/linux/copy_strip_binary.sh
index 8f15d9ba42..585310f6ce 100644
--- a/tools/ci_build/github/linux/copy_strip_binary.sh
+++ b/tools/ci_build/github/linux/copy_strip_binary.sh
@@ -32,6 +32,9 @@ then
     ln -s $LIB_NAME $BINARY_DIR/$ARTIFACT_NAME/lib/libonnxruntime.so
 fi
 cp $SOURCE_DIR/include/onnxruntime/core/session/onnxruntime_c_api.h  $BINARY_DIR/$ARTIFACT_NAME/include
+cp $SOURCE_DIR/include/onnxruntime/core/providers/cpu/cpu_provider_factory.h  $BINARY_DIR/$ARTIFACT_NAME/include
+cp $SOURCE_DIR/include/onnxruntime/core/providers/cuda/cuda_provider_factory.h  $BINARY_DIR/$ARTIFACT_NAME/include
+
 # copy the README, licence and TPN
 cp $SOURCE_DIR/README.md $BINARY_DIR/$ARTIFACT_NAME/README.md
 cp $SOURCE_DIR/docs/C_API.md $BINARY_DIR/$ARTIFACT_NAME/C_API.md