下面的代码演示了如何在.NET Core中使用“内存配置”：

/// 
    /// 获取格式设置    /// 
    /// 
         public static FormatSettings GetFormatSettings()    {      // Key使用冒号：分隔路径，实现层级化      Dictionary
     
       initialData = new Dictionary
      
             {        // 时间格式化        ["Format:DateTime:LongDatePattern"] = "dddd, MMMM d, yyyy",        ["Format:DateTime:LongTimePattern"] = "h:mm:ss tt",        ["Format:DateTime:ShortDatePattern"] = "M/d/yyyy",        ["Format:DateTime:ShortTimePattern"] = "h:mm tt",        // 金额格式化        ["Format:CurrencyDecimal:Digits"] = "2",        ["Format:CurrencyDecimal:Symbol"] = "$",      };      var source = new MemoryConfigurationSource      {        InitialData = initialData      };      IConfiguration configuration = new ConfigurationBuilder()              .Add(source)              .Build().GetSection("Format");      IOptions
       
         optionsAccessor = new ServiceCollection()          .AddOptions()          .Configure
        
         (configuration)          .BuildServiceProvider()          .GetService
         
          
           >(); FormatSettings settings = optionsAccessor.Value; return settings; } /// 
           
 /// 格式设置类 /// 
 public class FormatSettings { public DateTimeFormatSettings DateTime { get; set; } public CurrencyDecimalFormatSettings CurrencyDecimal { get; set; } } /// 
           
 /// 时间格式化设置 /// 
 public class DateTimeFormatSettings { public string LongDatePattern { get; set; } public string LongTimePattern { get; set; } public string ShortDatePattern { get; set; } public string ShortTimePattern { get; set; } } /// 
           
 /// 货币格式化设置 /// 
 public class CurrencyDecimalFormatSettings { public int Digits { get; set; } public string Symbol { get; set; } }