I always find myself having to look this stuff up, and it’s nearly always for the same format of redirect, so here’s a reminder for myself. In SharePoint, you can redirect to a page in Layouts (in this case, the site settings page) with:
SPUtility.Redirect("settings.aspx", SPRedirectFlags.Static | SPRedirectFlags.RelativeToLayoutsPage|SPRedirectFlags.UseSource, HttpContext.Current);
This also will redirect to a
&source= get parameter if available. It also deals with the HIVE number (
/15/) in the URL automatically.