How i can libere my application memoire in c#? : in my c# application load form i make load like 30 picture and this make my memory full and if i addd some more pic i get the message "that my memroy is full" 

1/ how i can make my memory empty or make more bigger ?
2/ the are any another way to get all my pics to picture box without make my memory  full ?

thank you for anyone wanna help or try help me
[this is my load form 

 1. List item

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  [1]: https://i.stack.imgur.com/bFVjy.png