From a8e283305038c7891db437d0646a58fed52e6583 Mon Sep 17 00:00:00 2001
From: Hector Li <hecli@microsoft.com>
Date: Sun, 23 Apr 2023 21:28:34 -0700
Subject: [PATCH] [QNN EP]Unblock Qnn EP for Csharp support (#15640)

### Description
Unblock Qnn EP for Csharp support

### Motivation and Context
Enable Csharp support for Qnn EP
---
 .../src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs | 8 ++++----
 .../InferenceTest.cs                                      | 6 ++++++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs b/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs
index 57e0942a3b..7590299000 100644
--- a/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs
+++ b/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs
@@ -369,16 +369,16 @@ namespace Microsoft.ML.OnnxRuntime
 
 
         /// <summary>
-        /// Append SNPE or XNNPACK execution provider
+        /// Append QNN, SNPE or XNNPACK execution provider
         /// </summary>
-        /// <param name="providerName">Execution provider to add. 'SNPE' or 'XNNPACK' are currently supported.</param>
+        /// <param name="providerName">Execution provider to add. 'QNN', 'SNPE' or 'XNNPACK' are currently supported.</param>
         /// <param name="providerOptions">Optional key/value pairs to specify execution provider options.</param>
         public void AppendExecutionProvider(string providerName, Dictionary<string, string> providerOptions = null)
         {
-            if (providerName != "SNPE" && providerName != "XNNPACK")
+            if (providerName != "SNPE" && providerName != "XNNPACK" && providerName != "QNN")
             {
                 throw new NotSupportedException(
-                    "Only SNPE and XNNPACK execution providers can be enabled by this method.");
+                    "Only QNN, SNPE and XNNPACK execution providers can be enabled by this method.");
             }
 
             if (providerOptions == null)
diff --git a/csharp/test/Microsoft.ML.OnnxRuntime.Tests.Common/InferenceTest.cs b/csharp/test/Microsoft.ML.OnnxRuntime.Tests.Common/InferenceTest.cs
index 7d4e3df25f..61205b7412 100644
--- a/csharp/test/Microsoft.ML.OnnxRuntime.Tests.Common/InferenceTest.cs
+++ b/csharp/test/Microsoft.ML.OnnxRuntime.Tests.Common/InferenceTest.cs
@@ -148,6 +148,12 @@ namespace Microsoft.ML.OnnxRuntime.Tests
                 ex = Assert.Throws<OnnxRuntimeException>(() => { opt.AppendExecutionProvider("SNPE"); });
                 Assert.Contains("SNPE execution provider is not supported in this build", ex.Message);
 #endif
+#if USE_QNN
+                opt.AppendExecutionProvider("QNN");
+#else
+                ex = Assert.Throws<OnnxRuntimeException>(() => { opt.AppendExecutionProvider("QNN"); });
+                Assert.Contains("QNN execution provider is not supported in this build", ex.Message);
+#endif
 
                 opt.AppendExecutionProvider_CPU(1);
             }