public static IConfigurationSourceContainer AddCommandLine(this IConfigurationSourceContainer configuration, string[] args)
 {
     configuration.Add(new CommandLineConfigurationSource(args));
     return(configuration);
 }
 public static IConfigurationSourceContainer AddEnvironmentVariables(this IConfigurationSourceContainer configuration, string prefix)
 {
     configuration.Add(new EnvironmentVariablesConfigurationSource(prefix));
     return(configuration);
 }
 public static IConfigurationSourceContainer AddIniFile(this IConfigurationSourceContainer configuration, string path)
 {
     configuration.Add(new IniFileConfigurationSource(path));
     return(configuration);
 }