泛型的Distinct(IEqualityComparer)的用法

 public class Comparint : IEqualityComparer<SBAlarmHelp>
    {
        #region IEqualityComparer<SBAlarmHelp> 成员

        public bool Equals(SBAlarmHelp x, SBAlarmHelp y)
        {
            return x.AlarmCode == y.AlarmCode ? false : true;
        }

        public int GetHashCode(SBAlarmHelp obj)
        {
            return obj.ToString().GetHashCode();
        }

        #endregion
    }

    /// <summary>
        /// 加载告警代码列表
        /// </summary>
        private void LoadAlarmList()
        {
            this.ComboBoxAlarmCode.Items.Clear();
            this.ComboBoxAlarmkeyword.Items.Clear();
            IList<SBAlarmLog> alarmLogList = alarmLogRepository.GetAll().Distinct(new Comparint()).ToList();  //去掉重复行
            if (alarmLogList != null && alarmLogList.Count > 0)
            {
                for (int i = 0; i < alarmLogList.Count; i++)
                {
                    this.ComboBoxAlarmCode.Items.Add(alarmLogList[i].AlarmCode);
                    this.ComboBoxAlarmkeyword.Items.Add(alarmLogList[i].AlarmKeyWord);
                }
                this.ComboBoxAlarmCode.SelectedItem = this.ComboBoxAlarmCode.Items[0];
                this.ComboBoxAlarmkeyword.SelectedItem = this.ComboBoxAlarmkeyword.Items[0];
            }

            if (this.sBAlarmHelp != null)
            {
                this.ComboBoxAlarmCode.SelectedItem = sBAlarmHelp.AlarmCode;
                this.ComboBoxAlarmkeyword.SelectedItem = sBAlarmHelp.AlarmKeyWord;
                this.txtSuggest.Text = this.sBAlarmHelp.AlarmHelp;
            }

        }