Where are Properties.Settings.Default Values Stored in .NET?

Understanding .NET Application Setting Storage

.NET applications utilize the Properties.Settings class for managing application configuration. The storage location of these settings, however, can be unclear.

Prior to .NET Framework 4, Properties.Settings.Default values resided in a user-specific directory. The first application execution creates a "settings" folder, containing a file named [application name].settings (XML format). The path varies by operating system:

• Windows XP and earlier: %userprofile%\Local Settings\Application Data
• Windows Vista and later: %userprofile%\appdata\local

The application prioritizes these user settings. If a setting is unavailable, it defaults to the values defined within the application's configuration file (e.g., MyApp.exe.config).

Crucially, using Properties.Settings.Default.Save() only updates the user-specific settings file; the application configuration file remains unchanged. This prioritization of user settings over defaults is a key design feature.

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