c# - How to order a list with a method in a collection class -

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i having problem searching method. want make function inside collection class can find products (objects) in list specific name , there after sort list price.

but because generic can't "reach" fields in objects in list. can please me?

here have tried:

public class productlist<t> : icollection<t>, icomparer<t> {     public list<t> _productlist = new list<t>();      // other methods       // 1. try:     public void funcsearch_name(string search_name, productlist<product> listin, out productlist<product> listout)     {         listout = listin.where(x => x.name.equals(search_name)).tolist(); // here complaining cant not implicity convert generic list productlist (i dont understand that)     }       // have tried this:     public void funcsearch_name(string search_name, ref list<t> listin, out list<t> listout)     {         listout = listin.where(x => x.name.equals(search_name)).tolist();         listout.orderbydescending(o => o.price).tolist(); // here can't find name , price because "t" not contains them..     } }

thank time. hope understand problem , can me.

why not make productlist limit t interface (or concrete product)?

public class productlist : icollection<iproduct>, icomparer<iproduct>

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