ProfileProperty: Change the display order of a existing Userprofile Property

Because of the fact that the SharePoint way of changing the userprofile propery order is a pain, here is the coding-way doing this task:

string siteUrl = "http://SITEURL";
 
using (SPSite localSite = new SPSite(siteUrl))
{
    SPServiceContext serviceContext = SPServiceContext.GetContext(localSite);
 
    int displayOrder = 10;
 
    ProfileSubtypeManager psm = ProfileSubtypeManager.Get(serviceContext);
    ProfileSubtype ps = psm.GetProfileSubtype(ProfileSubtypeManager.GetDefaultProfileName(ProfileType.User));
 
    ProfileSubtypePropertyManager pspm = ps.Properties;
 
    // update display order of the property
    pspm.SetDisplayOrderByPropertyName("PROPERTYNAME", displayOrder);
    // important: commit the display order!
    pspm.CommitDisplayOrder();
}

You need a instance of the local SPSite. With this, get a SPServiceContext instance.
Then you need a ProfileSubtypeManager instance (the ordering is managed by the ProfileSubtypeProperty out of the ProfileSubtype). and finally a ProfileSubtypePropertyManager.

To Update the displayorder finally, don't forget to call the "CommitDisplayOrder()" function.