How to Free memory after a form is closed (C# Win Forms)

Question

Hello,

 

I am building a Kiosk type of application where the user Navigates using Next and Previous buttons. Many child forms (form objects) are created everytime the user presses Next/Previous buttons. Before opening another form, I close / dispose the present form. I am also calling the GC.collect() method. But the RAM usage keeps on increasing. 

 

As the application runs 24x7, over a period of time the application becomes sluggish. At the start of the application it consumes around 20MB, but within 24 hrs, the RAM usage shoots up to 300 MB.

 

Note : The forms are opened using ShowDialog method. 

 

What is the best way to resolve these issues ?? 

 

Thanks