title: get an error as ExecuteNonQuery:Connection property has not been initialized
body: <pre><code>string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Samples\\login.mdb";
  String uname, pass;
  uname = textBox1.Text;
  
  pass = textBox2.Text; 
  OleDbConnection myConnection = new OleDbConnection(connectionString);
  myConnection.Open();
  
  String query = "insert into LOGIN_TABLE (UserName, Password) VALUES ('" +
      textBox1.Text.ToString() + "','" + textBox2.Text.ToString() + "') ";
  
  
  OleDbCommand myCommand = new OleDbCommand();
  myCommand.CommandText = query;
  OleDbParameter myParm = myCommand.Parameters.Add("@uname", OleDbType.VarChar, 50);
  myParm.Value = textBox1.Text;
  
  myParm = myCommand.Parameters.Add("@pass", OleDbType.VarChar, 50);
  myParm.Value = textBox2.Text;
  
  myCommand.ExecuteNonQuery();
  myConnection.Close();
  </code></pre>