title: why settings not save after close open application , using vb.net
body: <p>hi this my code to change property from  application setting  (connection string)</p>
  
  <p>i can't use 
  my.settings.ConnectionString1= "some connectionstring"
  because it read only
  so i use 
  my.settings.item()= ""</p>
  
  <pre><code> dim x= textbox1.text  ' //  like 127.0.0.1
   My.Settings.Item("ConnectionString1") = "server=" &amp; x &amp; ";user  id=root;password=root;port=3306;database=db1;charset=utf8;"
   My.Settings.Save()
   msgbox(my.settings.ConnectionString1)   ' here change happen 
   Me.Close()
  </code></pre>
  
  <p>after close and open it the i found the value not change</p>