Listing 13-29 extracted from chapter Generics

Listing 13-28<     > Listing 13-30

This listing can be compiled with the command line:
csc.exe /target:library Example_13_29.cs
Errors: 0 Warnings: 0

class C {
   public int Fct<U>(U u) where U : class, System.IComparable<U> ,new(){
      if ( u == null ) 
         return 0;
      U unew = new U();
      return u.CompareTo( unew );
   }
}