Start adding csharp api funcs

csharp/src/Microsoft.ML.OnnxRuntime/NativeCompileApiMethods.shared.cs

@@ -21,6 +21,9 @@ public struct OrtCompileApi
         public IntPtr ModelCompilationOptions_SetEpContextEmbedMode;
         public IntPtr CompileModel;
         public IntPtr ModelCompilationOptions_SetFlags;
+        public IntPtr ModelCompilationOptions_SetEpContextBinaryInformation;
+        public IntPtr ModelCompilationOptions_SetOutputModelWriteFunc;
+        public IntPtr ModelCompilationOptions_SetOutputModelHandleInitializerFunc;
     }
 
     internal class NativeMethods

csharp/src/Microsoft.ML.OnnxRuntime/NativeMethods.shared.cs

@@ -422,6 +422,7 @@ public struct OrtApi
         public IntPtr Node_GetGraph;
         public IntPtr Node_GetEpName;
         public IntPtr ReleaseExternalInitializerInfo;
+        public IntPtr CreateExternalInitializerInfo;
         public IntPtr ExternalInitializerInfo_GetFilePath;
         public IntPtr ExternalInitializerInfo_GetFileOffset;
         public IntPtr ExternalInitializerInfo_GetByteSize;

onnxruntime/core/session/onnxruntime_c_api.cc

@@ -2549,6 +2549,7 @@ ORT_API_STATUS_IMPL(OrtApis::CreateExternalInitializerInfo, _In_ const ORTCHAR_T
   ORT_UNUSED_PARAMETER(filepath);
   ORT_UNUSED_PARAMETER(file_offset);
   ORT_UNUSED_PARAMETER(byte_size);
+  ORT_UNUSED_PARAMETER(out);
   return OrtApis::CreateStatus(ORT_NOT_IMPLEMENTED, "CreateExternalInitializerInfo() is not supported in this build.");
 #endif
   API_IMPL_END

onnxruntime/test/providers/qnn/qnn_ep_context_test.cc

@@ -780,7 +780,6 @@ TEST_F(QnnHTPBackendTests, CompileApi_InputFile_OutputFile_InitializerHandler) {
   CheckEpContextNodeCounts(output_model_file, 2, 2);
 }
 
-#if 0
 static OrtStatus* ORT_API_CALL ReuseExternalInitializers(void* state,
                                                          const char* /*initializer_name*/,
                                                          const OrtValue* /*initializer_value*/,
@@ -842,7 +841,6 @@ TEST_F(QnnHTPBackendTests, CompileApi_InitializerHandler_ReuseExternalInitialize
 
   ASSERT_EQ(num_reused_ext_initializers, 2);  // Reused external conv weight and bias.
 }
-#endif
 
 // Test that the explicit compile API can be configured to return an error if the output model does not
 // have EPContext nodes.