private static string SourceDisplayName(IConfigurationSource source)
{
if (source is JsonConfigurationSource jsonSource)
{
return($"json file: {jsonSource.Path}");
}
if (source is CommandLineConfigurationSource)
{
return("command line parameters");
}
if (source is EnvironmentVariablesConfigurationSource)
{
return("environment variables");
}
return(source.ToString());
}