[SOLVED] IEnumerable.Except() and a custom comparer

[kanko]

Hello, I'm having troubles with the Except() method.
Instead returning the difference, it returns the original set.

I've tried by implementing the IEquatable and IEqualityComparer in the Account.
I've also tried creating a seperate IEqualityComparer class for Account.

When the Except() method is called from main, it doesn't seem to call my custom Equals() method, but when I tried Count(), it did call the custom GetHashCode() method!

I'm sure I made a trivial mistake somewhere and I hope a fresh pair of eyes can help me.

main:

IEnumerable<Account> everyPartnerID = 
    from partner in dataContext.Partners
    select new Account { IDPartner = partner.ID, Name = partner.Name };
 
 
IEnumerable<Account> hasAccountPartnerID = 
    from partner in dataContext.Partners
    from account in dataContext.Accounts
    where
        !partner.ID.Equals(Guid.Empty) &&
        account.IDPartner.Equals(partner.ID) &&
        account.Username.Equals("Special")
    select new Account { IDPartner = partner.ID, Name = partner.Name };
 
IEnumerable<Account> noAccountPartnerID = 
    everyPartnerID.Except(
        hasAccountPartnerID, 
        new LambdaComparer<Account>((x, y) => x.IDPartner.Equals(y.IDPartner)));           
 

Account:

    public class Account : IEquatable<Account>
    {
        public Guid IDPartner{ get; set; }
        public string Name{ get; set; }
 
/*        #region IEquatable<Account> Members
 
        public bool Equals(Account other)
        {
            return this.IDPartner.Equals(other.IDPartner);
        }
 
        #endregion*/
    }

LambdaComparer:

    public class LambdaComparer<T> : IEqualityComparer<T>
    {
        private readonly Func<T, T, bool> _lambdaComparer;
        private readonly Func<T, int> _lambdaHash;
 
        public LambdaComparer(Func<T, T, bool> lambdaComparer) :
            this(lambdaComparer, o => o.GetHashCode())
        {
        }
 
        public LambdaComparer(Func<T, T, bool> lambdaComparer, Func<T, int> lambdaHash)
        {
            if (lambdaComparer == null)
                throw new ArgumentNullException("lambdaComparer");
            if (lambdaHash == null)
                throw new ArgumentNullException("lambdaHash");
 
            _lambdaComparer = lambdaComparer;
            _lambdaHash = lambdaHash;
        }
 
        public bool Equals(T x, T y)
        {
            return _lambdaComparer(x, y);
        }
 
        public int GetHashCode(T obj)
        {
            return _lambdaHash(obj);
        }
    }