https://learn.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.webparts.personalizationstate.setdirty?view=netframework-4.8.1
PersonalizationState.SetDirty Method (System.Web.UI.WebControls.WebParts) | Microsoft Learn
Marks the current personalization state as having changed.
system websetdirtymethoduiwebparts