Generic IEqualityComparer implementation

GenericEqualityComparer.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace Helpers
{
    public class GenericEqualityComparer
    {
        public static IEqualityComparer<T> Create<T>(params Func<T, object>[] Param1)
        {
            return new Impl<T>(Param1);
        }

        private class Impl<T> : IEqualityComparer<T>
        {
            private readonly Func<T, object>[] accessors;


            public Impl(Func<T, object>[] accessors)
            {
                this.accessors = accessors;
            }

            public bool Equals(T x, T y)
            {
                return this.accessors.All(a => object.Equals(a(x), a(y)));
            }

            public int GetHashCode(T obj)
            {
                return this.accessors.Aggregate(17, (s, a) =>
                {
                    unchecked // Overflow is fine, just wrap
                    {
                        return s*23 + a(obj).GetHashCode();
                    }
                });
            }
        }
        
    }
}