How To Fill Dataset With Parameterized SELECT Statement

 Hello,

I have been reading about how you shouldn't build dynamic SQL statements (see TextBox1.Text in line 3)  and should use parameters instead, but I haven't yet found how to create a SELECT statement with a parameter that fills a dataset. If anyone can show me the correct way of doing this I would appreciate it so I can add it to my code snippets for proper coding practices. Thanks in advance for any assistance.           
            string strConnectionString =   ConfigurationManager.ConnectionStrings["sqlConnectionString"].ConnectionString;
            SqlConnection myConnection = new SqlConnection(strConnectionString);
 ->       string sqlSelect = "select * from customers where city = " + "'" + TextBox1.Text + "'";
            SqlDataAdapter da = new SqlDataAdapter(sqlSelect, myConnection);
            DataSet ds = new DataSet();
            myConnection.Open();
            da.Fill(ds, "myDataset");
            myConnection.Close();
 
jcfrasco