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Explain how to retrieve information from the configuration file at run time.1. To retrieve information from the configuration file.
2. Create an instance of AppSettingsReader to read the configuration file.
3. Call the GetValue method to read values represented in the configuration file.
4. To add configuration file entries
5. Create elements in the node of the configuration file.
6. Specify a value for the entry and a key in the element.
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