存储过程返回值 没取到～ 求助！

CREATE PROCEDURE sp_DispNewPictrueList

@Count int = 0 output

AS

 EXEC( 'SELECT TOP 5 p.[id],u.userName as 作者,[Title] AS 作品,[imgUrl] AS url

,[vote] AS 票数,[hit] AS 浏览 FROM [PictrueVote].[dbo].[Pictrue] AS p INNER JOIN Users as u ON p.uid = u.id

  Where p.[state] = ''true'' order by p.postTime Desc');

SELECT @Count =COUNT(1) from  [PictrueVote].[dbo].[Pictrue]

GO

string proc = "sp_DispNewPictrueList";

            List<Pictrue> list = new List<Pictrue>();

            count = 0;

            using (SqlConnection conn = new SqlConnection(DbHelperSQL.connectionString))

            {

                SqlCommand cmd = new SqlCommand();

                cmd.Connection = conn;

                cmd.CommandType = CommandType.StoredProcedure;

                cmd.CommandText = proc;

                SqlParameter param = new SqlParameter("@Count", SqlDbType.Int, 0, ParameterDirection.Output, true, 0, 0, string.Empty, DataRowVersion.Default, DBNull.Value);

                cmd.Parameters.Add(param);

                if (conn.State == ConnectionState.Closed)

                    conn.Open();

                SqlDataReader reader = cmd.ExecuteReader();

                count = (int)param.Value;

                while (reader.Read())

                {

                    Pictrue pic = new Pictrue

                    {

                        id = Convert.ToInt32(reader[0]),

                        UserName = Convert.ToString(reader[1]),

                        Title = Convert.ToString(reader[2]),

                        imgUrl = Convert.ToString(reader[3]),

                        vote = Convert.ToInt32(reader[4]),

                        hit = Convert.ToInt32(reader[5])

                    };

                    list.Add(pic);

                }

            }

            return list;