I am using  Dnn 4.8.4

To clear cache I tried  the following , both doesnt works for me

1  SynchronizeModule()  --  Obsolete . This method is depreciated it says

 2  Dim modSett As New DotNetNuke.Entities.Modules.ModuleController

     modSett.SynchronizeModule()   -- Access Of Shared Member,Constant member,enum ... qualifying expression will not be evaluated it says

Actually my scenario was

I am using Dnn Table "ModuleSettings" 

  To Get data from table I used

     Dim modSett As New DotNetNuke.Entities.Modules.ModuleController
     sett = modSett.GetModuleSettings(Me.ModuleId)

    ( This works fine but Issue comes when I update data in "ModuleSettings" table from Database  instead of Codebehind)

   If I update "ModuleSettings" Table from DataBase instead of code behind  then Cache was not cleared , so GetModuleSettings still gives Old data, Its not getting from DataBase . Its getting from cache