/// 自定义控件comobx的listitme
    /// </summary>
    public class ListItem
    {
        private string key;
        /// <summary>
        /// key 键
        /// </summary>
        public string Key
        {
            get { return key; }
            set { key = value; }
        }
    

        private string value;

        public string Value
        {
            get { return this.value; }
            set { this.value = value; }
        }

        /// <summary>
        /// key键,value:值
        /// </summary>
        /// <param name="mvalue">ValueMember</param>
        /// <param name="mkey">DisplayMember</param>
        public ListItem(string mvalue, string mkey)
        {
            this.Key = mkey;
            this.Value = mvalue;
        }
    }