diff --git a/samples/csharp_dotnetcore/13.basic-bot/BasicBot.cs b/samples/csharp_dotnetcore/13.basic-bot/BasicBot.cs
index 91d7e9daeb..4acdb9365e 100644
--- a/samples/csharp_dotnetcore/13.basic-bot/BasicBot.cs
+++ b/samples/csharp_dotnetcore/13.basic-bot/BasicBot.cs
@@ -210,7 +210,9 @@ private Activity CreateResponse(Activity activity, Attachment attachment)
         // Load attachment from file.
         private Attachment CreateAdaptiveCardAttachment()
         {
-            var adaptiveCard = File.ReadAllText(@".\Dialogs\Welcome\Resources\welcomeCard.json");
+            string[] paths = {".", "Dialogs", "Welcome", "Resources", "welcomeCard.json"};
+            string fullPath = Path.Combine(paths);
+            var adaptiveCard = File.ReadAllText(fullPath);
             return new Attachment()
             {
                 ContentType = "application/vnd.microsoft.card.adaptive",