Moving the copilot-sdk cookbook content in here

cookbook/copilot-sdk/dotnet/recipe/managing-local-files.cs

@@ -0,0 +1,56 @@
+#:package GitHub.Copilot.SDK@*
+#:property PublishAot=false
+
+using GitHub.Copilot.SDK;
+
+// Create and start client
+await using var client = new CopilotClient();
+await client.StartAsync();
+
+// Define tools for file operations
+var session = await client.CreateSessionAsync(new SessionConfig
+{
+    Model = "gpt-5"
+});
+
+// Wait for completion
+var done = new TaskCompletionSource();
+
+session.On(evt =>
+{
+    switch (evt)
+    {
+        case AssistantMessageEvent msg:
+            Console.WriteLine($"\nCopilot: {msg.Data.Content}");
+            break;
+        case ToolExecutionStartEvent toolStart:
+            Console.WriteLine($"  → Running: {toolStart.Data.ToolName} ({toolStart.Data.ToolCallId})");
+            break;
+        case ToolExecutionCompleteEvent toolEnd:
+            Console.WriteLine($"  ✓ Completed: {toolEnd.Data.ToolCallId}");
+            break;
+        case SessionIdleEvent:
+            done.SetResult();
+            break;
+    }
+});
+
+// Ask Copilot to organize files
+// Change this to your target folder
+var targetFolder = @"C:\Users\Me\Downloads";
+
+await session.SendAsync(new MessageOptions
+{
+    Prompt = $"""
+        Analyze the files in "{targetFolder}" and organize them into subfolders.
+
+        1. First, list all files and their metadata
+        2. Preview grouping by file extension
+        3. Create appropriate subfolders (e.g., "images", "documents", "videos")
+        4. Move each file to its appropriate subfolder
+
+        Please confirm before moving any files.
+        """
+});
+
+await done.Task;