Add CTRL-C guidance message to aspire run command output

src/Aspire.Cli/Commands/RunCommand.cs

@@ -188,7 +188,9 @@ protected override async Task<int> ExecuteAsync(ParseResult parseResult, Cancell
 
             _ansiConsole.Write(topPadder);
 
-            var isCodespaces = _configuration.GetValue<bool>("CODESPACES", false);
+            // Use the presence of CodespacesUrlWithLoginToken to detect codespaces, as this is more reliable
+            // than environment variables since it comes from the same backend detection logic
+            var isCodespaces = dashboardUrls.CodespacesUrlWithLoginToken is not null;
             var isRemoteContainers = _configuration.GetValue<bool>("REMOTE_CONTAINERS", false);
 
             if (isCodespaces || isRemoteContainers)
@@ -227,6 +229,30 @@ protected override async Task<int> ExecuteAsync(ParseResult parseResult, Cancell
                 {
                     // Just swallow this exception because this is an orderly shutdown of the backchannel.
                 }
+
+                // Display CTRL+C message after endpoints in codespaces/remote containers
+                var ctrlCGrid = new Grid();
+                ctrlCGrid.AddColumn();
+                ctrlCGrid.AddColumn();
+                ctrlCGrid.Columns[0].Width = longestLocalizedLength + 1;
+                ctrlCGrid.AddRow(Text.Empty, Text.Empty);
+                ctrlCGrid.AddRow(new Text(string.Empty), new Markup(RunCommandStrings.PressCtrlCToStopAppHost));
+
+                var ctrlCPadder = new Padder(ctrlCGrid, new Padding(3, 0));
+                _ansiConsole.Write(ctrlCPadder);
+            }
+            else
+            {
+                // Display CTRL+C message immediately if not in codespaces/remote containers
+                var ctrlCGrid = new Grid();
+                ctrlCGrid.AddColumn();
+                ctrlCGrid.AddColumn();
+                ctrlCGrid.Columns[0].Width = longestLocalizedLength + 1;
+                ctrlCGrid.AddRow(Text.Empty, Text.Empty);
+                ctrlCGrid.AddRow(new Text(string.Empty), new Markup(RunCommandStrings.PressCtrlCToStopAppHost));
+
+                var ctrlCPadder = new Padder(ctrlCGrid, new Padding(3, 0));
+                _ansiConsole.Write(ctrlCPadder);
             }
 
             await pendingLogCapture;

src/Aspire.Cli/Resources/RunCommandStrings.resx

@@ -143,7 +143,7 @@
     <value>Endpoints</value>
   </data>
   <data name="PressCtrlCToStopAppHost" xml:space="preserve">
-    <value>Press [bold]Ctrl+C[/] to stop the app host and exit.</value>
+    <value>Press [bold]CTRL+C[/] to stop the apphost and exit.</value>
     <comment>[bold] should not be localized</comment>
   </data>
   <data name="ProjectCouldNotBeRun" xml:space="preserve">