C#读取配置文件的方法汇总

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  class SQLConfiguration : ConfigurationSection
  {
    [ConfigurationProperty("type", IsRequired = true)]
    public string Type
    {
      get { return this["type"].ToString(); }
      set { this["type"] = value; }
    }

    [ConfigurationProperty("connectionString", IsRequired = true)]
    public string ConnectionString
    {
      get { return this["connectionString"].ToString(); }
      set { this["connectionString"] = value; }
    }
  }

      SQLConfiguration sqlCOnfig= (SQLConfiguration)ConfigurationManager.GetSection("SQLConfiguration");
      Console.WriteLine(sqlConfig.Type);
      Console.WriteLine(sqlConfig.ConnectionString);

  public class AccountConfiguration : ConfigurationSection
  {
    [ConfigurationProperty("users", IsRequired = true)]
    public AccountSectionElement Users
    {
      get { return (AccountSectionElement)this["users"]; }
    }
  }

  public class AccountSectionElement : ConfigurationElement
  {
    [ConfigurationProperty("username", IsRequired = true)]
    public string UserName
    {
      get { return this["username"].ToString(); }
      set { this["username"] = value; }
    }

    [ConfigurationProperty("password", IsRequired = true)]
    public string Password
    {
      get { return this["password"].ToString(); }
      set { this["password"] = value; }
    }
  }

     AccountConfiguration accountCOnfig= (AccountConfiguration)ConfigurationManager.GetSection("AccountConfiguration");
      Console.WriteLine(accountConfig.Users.UserName);
      Console.WriteLine(accountConfig.Users.Password);

      Configuration cOnfig= ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
      SmtpSection section = config.GetSection("system.net/mailSettings/smtp") as SmtpSection;
      Console.WriteLine(section.From);