高手请进，帮新手看线性表倒置的问题。

Question

高手帮我看看：错误 1 无法将类型“int[]”隐式转换为“test.Program.SeqList<int>” C:\Documents and Settings\Administrator\My Documents\Visual Studio 2008\Projects\test\test\Program.cs 236 29 testusing System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace test
{
    class Program
    {
        public interface IListDS<T>
        {
            int Getlength(); //求长度
            void Clear(); //清空
            bool IsEmpty(); //判断线性表是否为空
            void Append(T Item); //追加操作
            void Insert(T Item,int i); //插入操作
            T Delete(int i); //删除操作
            T GetElem(int i);//取表元
           int Locate(T value);//按值查找
           void ReversSeqList();//导致操作
        }
        public class SeqList<T> : IListDS<T>
        {
            private int maxsize;  //表的容量
            private T[] Data;    //数组，用于存放列表的数据元素
            private int last;    //指示表中最后一个元素的位置            //索引器
            public T this[int Index]
            {                get
                {
                    return Data[Index];
                }
                set
                {
                    Data[Index] = value;
                }            }            //最后一个元素的位置
            public int Last
            {
                get
                {
                    return last;
                }
            }            //容量属性
            public int Maxsize
            {
                get
                {
                    return maxsize;
                }
                set
                {
                    Maxsize = value;
                }
            }            //构造器
            public SeqList(int size)
            {
                Data = new T[size];
                maxsize = size;
                last = -1;
            }
            //表的长度
            public int Getlength()
            {
                return last + 1;
            }
            //清空表
            public void Clear()
            {
                last = -1;
            }            //判断表是否为空            public bool IsEmpty()
            {
                if (last == -1)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }            //判断表是否为满
            public bool IsFull()
            {
                if (last == maxsize - 1)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }            //在表末尾添加新元素
            public void Append(T Item)
            {
                if (last == maxsize - 1)
                {
                    Console.WriteLine("表已达最大值！");
                    return;
                }
                else
                {
                    Data[++last] = Item;
                }
            }            //在表中插入一个新元素
            public void Insert(T Item, int i)
            {
                if (IsFull())
                {
                    Console.WriteLine("List is Full!");
                    return;
                }
                if (i < 1 || i > last + 2)
                {
                    Console.WriteLine("越界！");
                    return;
                }
                if (i == last + 2)
                {
                    Data[last + 1] = Item;
                }
                else
                {
                    for (int j = last; j >= i - 1; --i)
                    {
                        Data[j + 1] = Data[j];
                    }
                    Data[i - 1] = Item;
                }
                ++last;
            }
            //删除表中第i个元素
            public T Delete(int i)
            {
                T tmp = default(T);
                if (IsEmpty())
                {
                    Console.WriteLine("List is Empty!");
                    return tmp;
                }
                if (i < 1 || i > last + 1)
                {
                    Console.WriteLine("数组越界！");
                    return tmp;
                }
                if (i == last + 1)
                {
                    tmp = Data[last--];
                }
                else
                {
                    tmp = Data[i - 1];
                    for (int j = i; j <= last; i++)
                    {
                        Data[j] = Data[j + 1];
                    }
                }
                --last;
                return tmp;
            }            //获得表中第i个元素
            public T GetElem(int i)
            {
                if (IsEmpty() || (i < 1) || (i > last + 1))
                {
                    Console.WriteLine("List is Empty or Position is error!");
                    return default(T);
                }
                else
                {
                    return Data[i - 1];
                }
            }
            //在表中查找值为value的元素            public int Locate(T value)
            {
                if (IsEmpty())
                {
                    Console.WriteLine("List is Empty!");
                    return -1;
                }
                int i = 0;
                for (i = 0; i <= last; ++i)
                {
                    if (value.Equals(Data[i]))
                    {
                        break;
                    }
                }
                if (i > last)
                {
                    return -1;
                }
                return i;
            }
         //倒置操作
            public void ReversSeqList()
            {
                
                T tmp =default(T);
                int len = Getlength();
                for (int i = 0; i <= len / 2; i++)
                {
                    tmp = Data[i];
                    Data[i] = Data[len - i];
                    Data[len - i] = tmp;
                }
            }
        }
        
        static void Main(string[] args)
        {
            SeqList<int> a =new int[]{ 12, 13, 14, 15, 16, 17 };
            a.ReversSeqList();
            Console.WriteLine(a);
           
        }
    }
}错误 1 无法将类型“int[]”隐式转换为“test.Program.SeqList<int>” C:\Documents and Settings\Administrator\My Documents\Visual Studio 2008\Projects\test\test\Program.cs 236 29 test