Hello I need an explanation when using a SortedListdecimal, decimal TotalList= new SortedList decimal, decimal(5); I need to use add would I use...

Hello I need an explanation when using a

SortedList<decimal, decimal> TotalList= new SortedList <decimal, decimal>(5);

I need to use add would I use TotalList.add(key, value);

This is where I get lost I need to display in a message box. Thank you any explanation or advice is appreciated.