From 53bacbe314da61bb70f61e4be0ba5217c7e1265e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=A1=82=E5=85=B5=E5=85=B5?=
 <43210631+bingbing-gui@users.noreply.github.com>
Date: Sun, 28 Dec 2025 21:05:14 +0900
Subject: [PATCH] Modify VisionAgent to fetch and send image bytes

Updated image handling in VisionAgent to use byte array.

System.Net.Http.HttpRequestException: 'Response status code does not indicate success: 403 (Forbidden).'
---
 .../Agents/Agent_Step11_UsingImages/Program.cs             | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dotnet/samples/GettingStarted/Agents/Agent_Step11_UsingImages/Program.cs b/dotnet/samples/GettingStarted/Agents/Agent_Step11_UsingImages/Program.cs
index f534e4edd7..4adeda20bc 100644
--- a/dotnet/samples/GettingStarted/Agents/Agent_Step11_UsingImages/Program.cs
+++ b/dotnet/samples/GettingStarted/Agents/Agent_Step11_UsingImages/Program.cs
@@ -17,9 +17,14 @@
         name: "VisionAgent",
         instructions: "You are a helpful agent that can analyze images");
 
+
+using HttpClient httpClient = new();
+httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("Mozilla/5.0 (Windows NT 10.0; Win64; x64)");
+byte[] imageBytes = await httpClient.GetByteArrayAsync("https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg");
+
 ChatMessage message = new(ChatRole.User, [
     new TextContent("What do you see in this image?"),
-    new UriContent("https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg", "image/jpeg")
+    new DataContent(imageBytes, "image/jpeg")
 ]);
 
 var thread = agent.GetNewThread();