How to speed up .NET winforms rendering

Question

I have a series of forms and navigate between them.

Each form has a set of controls for which I load properties from SQLite database and this is the long (about 1s)

Answer 1

There is a simple way to speed up perceived performance of many controls, especially data intensive ones like listviews, listboxes, combo boxes etc.

Before you populate them call the BeginUpdate() method and when done call the EndUpdate(). This disables the redrawing of the control until you're done populating it with data.