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Editorial Team
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Asked: 2026-05-15T20:29:28+00:00

When creating my application’s or library’s configuration, I generally prefer using a custom configuration

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When creating my application’s or library’s configuration, I generally prefer using a custom configuration section over the <appSettings> section for the following reasons.

  • Framework serialization to a user-defined configuration object; each config value has an appropriate type
  • Configuration values may be validated against type and value ranges with attributes

Given this, when would I want to use the loose-typed <add/> key/value mechanism of the <appSettings> section? As I recall, application-level configuration in this section can override existing machine-level configuration from machine.config. Is this the only case, or are there other reasons?

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1 Answer

  1. Editorial Team

    It’s easier for quick-and-dirty applications.

    It’s the same reason ASP.NET has things like the magic “Page_Load” method – no explicit wiring, you probably don’t use it in an enterprise-y application; it’s just there for RAD.

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