add Key tag in web.config appSettings / custom tag in web.config

Sometime we need to add custom tags or key in web.config. It is easy to add key in <appSettings> and easy to access fromc# code.
web.config looks like that:
<appSettings>
    <add key=”Name” value=”Ashrafur Rahaman”/>
    <add key=”Address” value=”Kuala Lumpur, Malaysia” />
    <add key=”Contact” value=”faisal10dec@gmail.com” />
</appSettings>
c# code for access key value:
using System.Collections.Specialized;
using System.Configuration;
NameValueCollection sAll = ConfigurationManager.AppSettings;
foreach (string s in [...]

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