If you have multiple screens in the one activity, then consider grouping each screen onto its own panel, and loading each layout into its corresponding screen panel.
Then (I am pretty sure) you can make an entire screen visible or hidden just with the one Panel.Visible = True/False.
And just keep all the screens hidden, except for the screen that is currently active and you want displayed.
But watch out for duplicates of views, eg if two layouts both have a Save button, make sure the two buttons have different names.