Introduction to asp.net core configuration

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In the previous asp.net, it was generally configured under the appSettings node in the web.config file, which was inflexible and could not be configured with dimensional values. For example:

Then introduce the System.Configuration.dll file into the project and import the using System.Configuration namespace into the class

String connStr = ConfigurationSettings.AppSettings ["connStr"] .ToString ()

Of course, you can also use xml files to replace the sequence of xml file contents with object instances.

In asp.net core, the configuration mainly includes host configuration and system configuration.

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