csharp code

Author: aahill

articles/ai-services/agents/how-to/tools/bing-custom-search-samples.md

@@ -35,6 +35,123 @@ zone_pivot_groups: selection-bing-custom-grounding
 
 :::zone-end
 
+::: zone pivot="csharp"
+
+## Step 1: Create a project client
+
+Create a client object, which will contain the connection string for connecting to your AI project and other resources.
+
+```csharp
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Azure.Core;
+using Azure.Core.TestFramework;
+using NUnit.Framework;
+
+var connectionString = System.Environment.GetEnvironmentVariable("PROJECT_CONNECTION_STRING");
+var modelDeploymentName = System.Environment.GetEnvironmentVariable("MODEL_DEPLOYMENT_NAME");
+var bingConnectionName = System.Environment.GetEnvironmentVariable("BING_CONNECTION_NAME");
+
+var projectClient = new AIProjectClient(connectionString, new DefaultAzureCredential());
+
+AgentsClient agentClient = projectClient.GetAgentsClient();
+```
+
+## Step 2: Create an Agent with the Grounding with Bing search tool enabled
+
+To make the Grounding with Bing search tool available to your agent, use a connection to initialize the tool and attach it to the agent. You can find your connection in the **connected resources** section of your project in the [Azure AI Foundry portal](https://ai.azure.com/).
+
+```csharp
+ConnectionResponse bingConnection = projectClient.GetConnectionsClient().GetConnection(bingConnectionName);
+var connectionId = bingConnection.Id;
+
+ToolConnectionList connectionList = new()
+{
+    ConnectionList = { new ToolConnection(connectionId) }
+};
+BingGroundingToolDefinition bingGroundingTool = new(connectionList);
+
+Agent agent = agentClient.CreateAgent(
+   model: modelDeploymentName,
+   name: "my-assistant",
+   instructions: "You are a helpful assistant.",
+   tools: [bingGroundingTool]);
+```
+
+## Step 3: Create a thread
+
+```csharp
+AgentThread thread = agentClient.CreateThread();
+
+// Create message to thread
+ThreadMessage message = agentClient.CreateMessage(
+    thread.Id,
+    MessageRole.User,
+    "How does wikipedia explain Euler's Identity?");
+```
+
+## Step 4: Create a run and check the output
+
+Create a run and observe that the model uses the Grounding with Bing Search tool to provide a response to the user's question.
+
+
+```csharp
+
+// Run the agent
+ThreadRun run = agentClient.CreateRun(thread, agent);
+do
+{
+    Thread.Sleep(TimeSpan.FromMilliseconds(500));
+    run = agentClient.GetRun(thread.Id, run.Id);
+}
+while (run.Status == RunStatus.Queued
+    || run.Status == RunStatus.InProgress);
+
+Assert.AreEqual(
+    RunStatus.Completed,
+    run.Status,
+    run.LastError?.Message);
+
+PageableList<ThreadMessage> messages = agentClient.GetMessages(
+    threadId: thread.Id,
+    order: ListSortOrder.Ascending
+);
+
+foreach (ThreadMessage threadMessage in messages)
+{
+    Console.Write($"{threadMessage.CreatedAt:yyyy-MM-dd HH:mm:ss} - {threadMessage.Role,10}: ");
+    foreach (MessageContent contentItem in threadMessage.ContentItems)
+    {
+        if (contentItem is MessageTextContent textItem)
+        {
+            string response = textItem.Text;
+            if (textItem.Annotations != null)
+            {
+                foreach (MessageTextAnnotation annotation in textItem.Annotations)
+                {
+                    if (annotation is MessageTextUrlCitationAnnotation urlAnnotation)
+                    {
+                        response = response.Replace(urlAnnotation.Text, $" [{urlAnnotation.UrlCitation.Title}]({urlAnnotation.UrlCitation.Url})");
+                    }
+                }
+            }
+            Console.Write($"Agent response: {response}");
+        }
+        else if (contentItem is MessageImageFileContent imageFileItem)
+        {
+            Console.Write($"<image from ID: {imageFileItem.FileId}");
+        }
+        Console.WriteLine();
+    }
+}
+
+agentClient.DeleteThread(threadId: thread.Id);
+agentClient.DeleteAgent(agentId: agent.Id);
+```
+
+:::zone-end
+
 ::: zone pivot="javascript"
 
 ## Step 1: Create a project client