Oracle.ManagedDataAccess.Client.OracleException:“ORA-00936: 缺失表达式”

static void Main(string[] args)
        {
 
            string sql = "insert into StudentC(Stuid, Stuname, Stupass) values(@Stuid,@Stuname,@Stupass)";
            OracleParameter[] parameters =
            {
                new OracleParameter("@Stuid",OracleDbType.Int32,),
                new OracleParameter("@Stuname",OracleDbType.Varchar2,),
                new OracleParameter("@Stupass",OracleDbType.Varchar2,)
            };
            parameters[].Value = ;
            parameters[].Value = "疯了";
            parameters[].Value = "studen";
            Db_Helper_DG.ExecuteNonQuery(sql, CommandType.Text,parameters);
 
        }

这是我最开始写的代码，讲@符号换成：，因为@符号是sqlserver中的写法。