Add multi project launch doc

Author: ghogen

docs/ide/how-to-set-multiple-startup-projects.md

@@ -1,7 +1,7 @@
 ---
 title: 'Set multiple startup projects'
 description: Discover the Visual Studio process that allows you to specify how more than one project is run when you start the debugger.
-ms.date: 11/01/2023
+ms.date: 10/21/2024
 ms.topic: how-to
 helpviewer_keywords:
 - startup projects, setting multiple startup projects
@@ -28,6 +28,52 @@ Some project templates include multiple projects that are already configured to
 
 4. Choose the **Multiple Startup Projects** option and set the appropriate actions.
 
+## Multi-project launch profiles
+
+You can set up and save profiles for launching specific projects within a multi-project solution in predefined states for debugging. This simplifies the process of working with complex solutions, improves debugging efficiency, and enables easy sharing of configurations among team members.
+
+### Enable multi-project launch profile
+
+Multi-project launch profiles are available in Visual Studio 2022 17.11 and later. To enable or disable the **Multi-project Launch Profiles** feature, go to **Tools > Options > Preview Features** and toggle the checkbox for **Enable Multi Launch Profiles**.
+
+:::image type="content" source="media/launch-multiple-projects/tools-options-enable-multi-project-launch.png" alt-text="Screenshot showing the option to enable Multi-project Launch Profiles in the Tools > Options dialog." border="true":::
+
+### Create a multi-project launch profile
+
+1. Open your Visual Studio solution that contains multiple projects.
+1. In Solution Explorer, right-click on your solution, and select **Configure Startup Projects...**.
+
+   :::image type="content" source="media/launch-multiple-projects/configure-startup-projects-menu-item.jpg" alt-text="Screenshot showing the Configure startup projects menu item." border="true":::
+
+   You can also press **Ctrl**+**Q** (Quick Launch) and search for "Configure startup projects" in Feature Search.
+
+   :::image type="content" source="media/launch-multiple-projects/quick-launch-configure-startup-projects.png" alt-text="Screenshot showing searching for configure startup projects in Feature Search." border="true" :::
+
+   The **Solution Property Pages** dialog appears.
+
+1. In the Solution Property Pages, click on the **Common Properties** tab, and select **Configure Startup Projects**.
+1. In the **Configure Startup Projects** section, choose the **Multiple startup projects** radio button.
+
+     :::image type="content" source="media/launch-multiple-projects/solution-property-pages.jpg" alt-text="Screenshot showing the Multiple startup projects radio button." border="true":::
+
+   Below the radio button, you'll see a list of all the projects in your solution, and whether they are set to be launched or not when you press **F5**, and whether each project is started under the debugger or without debugging.
+
+   You can use the up and down arrows to control the order in which projects will be launched.
+
+1. Set the action for each project to either **Start**, **Start without debugging**, or **None**, and select a debug target depending on your requirements.
+
+   ![Screenshot showing the options for starting a project.](media/launch-multiple-projects/launch-profiles-start-options.png)
+
+1. Enable the **Share Profile** checkbox if you want to share the profile with other Visual Studio users by checking it into the `.config` file in the Source Control repo.
+   Launch profiles are saved to a JSON file in the same directory as the solution. The **Share Profile** checkbox determines whether the profile is saved to a user-specific file (unchecked) or to a file intended for source control tracking, such as in Git (checked).
+
+   :::image type="content" source="media/launch-multiple-projects/share-profile.png" alt-text="{alt-text}" border="true":::
+
+1. Once you've configured the startup action for each project, click the **OK** or **Apply** button to save the profile.
+   The created launch profile appears in the toolbar dropdown list, allowing you to select the profile you want to debug.
+
+   :::image type="content" source="media/launch-multiple-projects/profile-in-toolbar.png" alt-text="Screenshot showing launch profile in toolbar.":::
+
 ## With Docker Compose
 
 When you're using Docker Compose to launch containerized projects on a local machine, you use a different method (launch profiles) to start multiple projects.