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1<configuration>
2<appSettings file="appSettings.config">
3</appSettings>
4<system.web>
5<!-- standard web settings go here -->
6</system.web>
7</configuration>
8	
9<appSettings>
10<add key="APIKey" value="YourApiKeyValue" />
11<add key="AnotherKey" value="AnotherValue" />
12</appSettings>
13	
14var apiKey = ConfigurationManager.AppSettings["APIKey"];
15	
16<configuration>
17    <appSettings>
18        <add key="APIKey" value="12345"/>
19    </appSettings>
20</configuration>
21	
22string apiKey = ConfigurationManager.AppSettings["APIKey"];
23	
24<configuration>
25   <appSettings>
26      <add key="SecretKey" value="0" />
27   </appSettings>
28</configuration>
29
30
31var secretKey = ConfigurationManager.AppSettings.Get("SecretKey");