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Partial Comparer for nullable value

using System.Collections.Generic; using System.ComponentModel;     public static class PartialComparer     {         public static int? Compare<T>(T first, T second)         {             return Compare(Comparer<T>.Default, first, second);         }         public static int? Compare<T>(IComparer<T> comparer,T first,T second)         {             int ret = comparer.Compare(first, second);             if (ret == 0)             {                 return null;             }             return ret;         }     }