public class App
static void Main()
StringBuilder sbConcatenated = new StringBuilder();
StringBuilder sbIndividual = new StringBuilder();
foreach(string key in ConfigurationSettings.AppSettings)
sbConcatenated.Append(key + "=" + ConfigurationSettings.AppSettings[key] + "\n");
sbIndividual.Append(key + "\n");
foreach(string value in ConfigurationSettings.AppSettings.GetValues(key))
sbIndividual.Append("\t" + value + "\n");
MessageBox.Show("CONCATENATED:\n" + sbConcatenated.ToString() +
"\nINDIVIDUAL:\n" + sbIndividual.ToString(), "AppSettings");
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