C# – Choosing Sharepoint save location for an InfoPath form

SharePoint list is a flat structure, and because of that Infopath does not allow you map repeating sections to list columns.

You might wanna consider the following workaround:

• Store Infopath form to one library (along with non-repeating fields)
• Use one of these custom activities to extract data from repeating table and copy it to another list
• Create a custom data view or a web part to display these items (if necessary)

This approach can be useful if you need to do some additional tasks with the repeating data.

If you work with Visual Studio then it is pretty easy to get persistable settings. Right click on the project in Solution Explorer and choose Properties. Select the Settings tab and click on the hyperlink if settings doesn't exist.

Use the Settings tab to create application settings. Visual Studio creates the files Settings.settings and Settings.Designer.settings that contain the singleton class Settings inherited from ApplicationSettingsBase. You can access this class from your code to read/write application settings:

Properties.Settings.Default["SomeProperty"] = "Some Value";
Properties.Settings.Default.Save(); // Saves settings in application configuration file

This technique is applicable both for console, Windows Forms, and other project types.

Note that you need to set the scope property of your settings. If you select Application scope then Settings.Default.<your property> will be read-only.

Reference: How To: Write User Settings at Run Time with C# - Microsoft Docs