Data Binding

Question

Hello

I bind a textbox with a key in app.config file but when change value in the textbox. The changes not shown in the app.config file.

I tried to change value manually by using this line

System.Configuration.ConfigurationSettings.AppSettings.Set("FileSize","50");

It throws an exception that collection is read-only

So what i have to do to change values in the app.config file.

Thanks in advance

Take care