I'm trying to write to an application settings file.  I'm using VS2005 and am following the example found at http://msdn2.microsoft.com/en-us/library/ms171565.aspx

I added a settings file to the application and it modified my app.config as you see below:

Tonya

You may have to save it to the configuration file at runtime using the ConfigurationManager.

There are two things you need to do: 1) change Settings to refer to the base indexer and 2) cast the Object to Color (for the get accessor):

public class MyUserSettings : ApplicationSettingsBase
{
    [UserScopedSetting()]
    [DefaultSettingValue("white")]
    public Color BackgroundColor
    {
        get
        {
            // Cast the Object to Color:
            return (Color)base["BackColor"];
        }
        set
        {
            base["BackColor"] = value;
        }
    }
}

Thanks for your help...I have another question

What do you mean by change Settings to the base indexer? Change it similarly to MyUserSettings?  VS2005 generated a Settings class when I added the application setting for BackColor...  I've made some notes in the code below in red

//---------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//     Runtime Version:2.0.50727.42
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//----------------------------------------------------------------------

namespace WindowsApplication1 {
        
    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "8.0.0.0")]
  internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
       
        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
       
        public static Settings Default {
            get {
                return defaultInstance;
            }
        }
       
        [global::System.Configuration.UserScopedSettingAttribute()]
        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
        [global::System.Configuration.DefaultSettingValueAttribute("255, 224, 192")]
        public global::System.Drawing.Color BackColor {
            get {
                return ((global::System.Drawing.Color)(this["BackColor"]));
                //Should the be:
                //return ((global::System.Drawing.Color)base["BackColor"]);

}
            set {
                this["BackColor"] = value;
                //And this 
                //base["BackColor"] = value;
                           }
        }
    }
}

Either way (with or without the changes in red above)  I get the following error when I continue with the example code shown below

ERROR: Cannot bind to the property 'BackgroundColor' on the target control.
Parameter name: PropertyName

CODE:
public Form1()
        {
            InitializeComponent();
            MyUserSettings myUserSettings = new MyUserSettings();
            this.DataBindings.Add(new Binding("BackgroundColor", myUserSettings, "BackColor"));

        }

Here's what ended up working.  I didn't use the MyUserSettings class at all.  VS2005 builds a class when you add the user or application settings.

To read the settings in app.config I added

Color color = Properties.Settings.Default.BackColor;
this.BackColor = color;

I was able to change the color at runtime by:

Thanks again for all your help.

Tonya

You may have to save it to the configuration file at runtime using the ConfigurationManager.

Found it:

Thanks again for all your help.

Tonya