Illustrate using ResumeSessionAsync

Author: jeffhandley

docs/concepts/transports/transports.md

@@ -95,14 +95,20 @@ var transport = new HttpClientTransport(new HttpClientTransportOptions
 
 #### Resuming sessions
 
-Streamable HTTP supports session resumption. Save the session ID and reuse it to reconnect:
+Streamable HTTP supports session resumption. Save the session ID, server capabilities, and server info from the original session, then use <xref:ModelContextProtocol.Client.McpClient.ResumeSessionAsync*> to reconnect:
 
 ```csharp
 var transport = new HttpClientTransport(new HttpClientTransportOptions
 {
     Endpoint = new Uri("https://my-mcp-server.example.com/mcp"),
     KnownSessionId = previousSessionId
 });
+
+await using var client = await McpClient.ResumeSessionAsync(transport, new ResumeClientSessionOptions
+{
+    ServerCapabilities = previousServerCapabilities,
+    ServerInfo = previousServerInfo
+});
 ```
 
 #### Streamable HTTP server (ASP.NET Core)