xyz.net

Hi everyone my English and programming levels are low, I hope you still want to answer and help me. i use c# asp.net . what i would like to know is if the beautiful solutions i see on this site can call functions in c# for example, the button that I find at the link https://www.w3schools.com/howto/howto_js_dropdown.asp can call the function "function()" ? and how? Thank you?