c# - IComparer classes for custom class -

i have bunch cards in list, , want sort them ascending or descending:

private list<card> cards = new list<card>(); 

ascending/descending mean have compare values of cards, simply.

what do? icomparable interface seems not enough because can sort 1 "default" way. trying implement icomparer, fail. in same class file card, try add comparing class descending order:

public class cardcompdesc : icomparer<card> {     int icomparer.compare(object a, object b)         // return 0, -1, or -1 later         return 0     { } 

but here compiler complains cannot find icomparer in current context. if remove <card> definition, class compiles. in order able sort cards above, this: this.cards.sort(new cardcompdesc()); looks have use icomparer<> on icomparer. doing wrong?

i grabbed compare use works.. here gist of it...

using system; using system.collections.generic; using system.linq; using system.text;  namespace mynamespace {     public class mycomparer: icomparer<int>     {         public int compare(int x, int y)         {             // x greater move             if (x > y)             {                 return 1;             }              // x smaller move y             if (x < y)             {                 return -1;             }              // nothing (equal)             return 0;         }     } }