不会实现接口成员

//接口代码
using System;
using System.Collections.Generic;
using System.Text;

namespace SJ.Search
{
    public interface ICustomerInfo
    {
        CustomerInfo Customer
        { get;}
    }
}
//Customer类
using System;
using System.Collections.Generic;
using System.Text;

namespace SJ.Search
{
    public class CustomerInfo
    {
        #region CustomerInfo

        private int _CustomerId;
        private string _Customer;
        private string _ShortName;
        private string _CustomerCode;
        private int _CustomerTypeId;
        private int _CustomerStepId;

        private int _RelationId;
        private int _SourceId;
        private int _VocationId;
        private int _ScaleId;
        private int _CreditId;
        private int _EvaluateId;
        private int _OperaterId;   
        private int _Father_Customer_Id;
        private string _CreateBeginDate;
        private string _CreateEndDate;
        private string _UpdateBeginDate;
        private string _UpdateEndDate;


        #endregion

        

        #region  CustomerInfo
        public int CustomerId
        {
            set { _CustomerId = value; }
            get { return _CustomerId; }
        }

        public string Customer
        {
            set { _Customer = value; }
            get { return _Customer; }
        }