请问一下我代码哪里有错无法向数据库插入数据

String Sqlconn = "Server=.;Database=cp;User ID=sa;PassWord=1992622";
        SqlConnection con = new SqlConnection(Sqlconn);
        con.Open();
        string UserName1 = TextBox1.Text.Trim();
        string Umm = TextBox2.Text.Trim();
        SqlCommand insert = new SqlCommand("insert into member values ('12321','4564", con);
        insert.ExecuteNonQuery();