怎么在代码中调用存储过程

namespace ConsoleApplication23
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> list = ReturnCheckArea("东四", "", "乡", "镇", "街道", "区").ToList();
            List<string> list1 = ReturnCheckArea("海城", "县", "区", "市", "").ToList();
            List<string> list2 = ReturnCheckArea("鞍山", "市", "").ToList();
            List<string> list3 = ReturnCheckArea("辽宁", "省", "").ToList();
            string temp = string.Empty;
            for (int i = 0; i < list.Count; i++)
            {
                for (int j = 0; j < list1.Count; j++)
                {
                    for (int k = 0; k < list2.Count; k++)
                    {
                        for (int m = 0; m < list3.Count; m++)
                        {
                           temp=SelectStrStreet(list[i], list1[j], list2[k], list3[m]);
                           if (temp.Length <= 0)
                           {
                               continue;
                           }
                           else
                           {
                               return;
                           }
                        }
                    }
                }
            }
        }
        private static string SelectStrStreet(string street, string xian, string city, string prov)
        {
            string retStr = "";
            using (SqlConnection sqlconn = new SqlConnection("Data Source=ZHANG-PC;Initial Catalog=config;Integrated Security=True"))
            {
                sqlconn.Open();
                using (SqlCommand cmd = sqlconn.CreateCommand())
                {
                    string sql = "ChechArear";
                    cmd.CommandText = sql;
                    cmd.CommandType = CommandType.StoredProcedure;
                    IDataParameter[] parameters = {
                new SqlParameter("@street", SqlDbType.NVarChar,50) ,
                new SqlParameter("@county", SqlDbType.NVarChar,50) ,
                new SqlParameter("@city",SqlDbType.NVarChar,50),
                new SqlParameter("@prov",SqlDbType.NVarChar,50),
                new SqlParameter("@inReturn",SqlDbType.NVarChar,50)};
                    parameters[0].Value = street;
                    parameters[1].Value = xian;
                    parameters[2].Value = city;
                    parameters[3].Value = prov;
                    parameters[4].Direction = ParameterDirection.Output;
                    cmd.Parameters.AddRange(parameters);
                    cmd.ExecuteNonQuery();
                    retStr = parameters[4].Value.ToString();
                }
                return retStr;
            }
        }
         private static IList<string> ReturnCheckArea(string temparea, params string[] strs)
        {

            List<string> list = new List<string>();
            if (strs.Length <= 0)
            {
                list.Add(temparea);
                return list;
            }
            foreach (string s in strs)
            {
                list.Add(temparea + s);
            }
            return list;
        }
    }
}