c# 创建DVASE IV 数据库，数值型问题

Question

            OleDbConnection conn = new OleDbConnection();
            string connStr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=d:\;Extended Properties=dBASE IV;User ID=Admin;Password=;";
            conn.ConnectionString = connStr;
            conn.Open();
            string Td = "create table aaa.dbf (aaa decimal(10,0))";
            OleDbCommand CmdTd = new OleDbCommand(Td, conn);
            CmdTd.ExecuteNonQuery();
            CmdTd.Dispose();