.NET: Correct endpoint override instructions in Responses samples

dotnet/samples/04-hosting/af-hosting/local_responses/Server/Program.cs

@@ -113,7 +113,7 @@ static string LookupWeather([Description("The city to look up weather for.")] st
 });
 
 // Bind to a fixed local URL so the paired client sample has a deterministic default.
-// Override with the ASPNETCORE_URLS environment variable when needed.
+// To use a different address, change the URL below and set RESPONSES_SERVER_URL in the client.
 app.Run("http://localhost:5000");
 
 // Application-owned trust decision. Replace with real authentication + authorization: verify the caller,

dotnet/samples/04-hosting/af-hosting/local_responses/Server/README.md

@@ -25,8 +25,9 @@ The route persists each turn under a continuation id chosen by how the caller co
   under the newly minted response id, so a later `previous_response_id` can branch from that exact point and
   two branches from the same prior response stay independent.
 
-The agent has a deterministic `lookup_weather` tool. Binds to `http://localhost:5000` (override with
-`ASPNETCORE_URLS`).
+The agent has a deterministic `lookup_weather` tool. Binds to `http://localhost:5000`. To use a different address,
+change the URL passed to `app.Run` in `Program.cs` and set `RESPONSES_SERVER_URL` to the same address
+in the client shell.
 
 ```bash
 export FOUNDRY_PROJECT_ENDPOINT="https://<your-resource>.services.ai.azure.com/api/projects/<your-project>"

dotnet/samples/04-hosting/af-hosting/local_responses_workflow/Server/Program.cs

@@ -118,7 +118,7 @@ static Workflow BuildWorkflow(AIAgent writer)
 });
 
 // Bind to a fixed local URL so the paired client sample has a deterministic default.
-// Override with the ASPNETCORE_URLS environment variable when needed.
+// To use a different address, change the URL below and set RESPONSES_SERVER_URL in the client.
 app.Run("http://localhost:5001");
 
 // Flattens the Responses input messages into a single brief string for the workflow's start executor.

dotnet/samples/04-hosting/af-hosting/local_responses_workflow/Server/README.md

@@ -11,7 +11,9 @@ This server supports **`previous_response_id` continuation only** and **rejects
 with HTTP 400**. Because `previous_response_id` rotates every turn, the app owns a cursor that maps each
 response id to the stable workflow session id, so the whole rotating chain resumes the same checkpointed
 run. The first turn runs the workflow forward; later turns restore the latest checkpoint and run forward
-with the new brief. Binds to `http://localhost:5001` (override with `ASPNETCORE_URLS`).
+with the new brief. Binds to `http://localhost:5001`. To use a different address,
+change the URL passed to `app.Run` in `Program.cs` and set `RESPONSES_SERVER_URL` to the same address
+in the client shell.
 
 `HostedWorkflowState` is constructed with a **workflow factory** and `cacheWorkflow: false` (the default,
 shown explicitly), so it builds a fresh workflow instance for every run. This lets independent sessions run