Create a .NET dictionary containing all AppSetting keys and their related values.
//get dictionary of key/value pairs
var appSettings = System.Configuration.ConfigurationManager.AppSettings.AllKeys
.ToDictionary(key => key, key => System.Configuration.ConfigurationManager.AppSettings[key]);
//display them on an mvc page
<h1>AppSettings</h1>
<div>
@foreach (var pair in appSettings)
{
<div>
@pair.Key | @pair.Value
</div>
}
</div>