diff --git a/csharp/test/Microsoft.ML.OnnxRuntime.Tests.NetCoreApp/InferenceTest.netcore.cs b/csharp/test/Microsoft.ML.OnnxRuntime.Tests.NetCoreApp/InferenceTest.netcore.cs
index 161802084d..fb4cd8a389 100644
--- a/csharp/test/Microsoft.ML.OnnxRuntime.Tests.NetCoreApp/InferenceTest.netcore.cs
+++ b/csharp/test/Microsoft.ML.OnnxRuntime.Tests.NetCoreApp/InferenceTest.netcore.cs
@@ -215,7 +215,7 @@ namespace Microsoft.ML.OnnxRuntime.Tests
 
         private static Func<DirectoryInfo, IEnumerable<DirectoryInfo>> getOpsetDirectories = delegate (DirectoryInfo modelsDirInfo)
         {
-            return modelsDirInfo.EnumerateDirectories("opset*", new EnumerationOptions(){RecurseSubdirectories = true});
+            return modelsDirInfo.EnumerateDirectories("opset*", SearchOption.AllDirectories);
         };
 
         private static Dictionary<string, string> GetSkippedModels(DirectoryInfo modelsDirInfo)