ystem.Keywords" content="CheckAllNull 方法" /><meta name="System.Keywords" content="MenuMatchRule.CheckAllNull 方法" /><meta name="Microsoft.Help.F1" content="Senparc.Weixin.MP.Entities.Menu.MenuMatchRule.CheckAllNull" /><meta name="Microsoft.Help.Id" content="M:Senparc.Weixin.MP.Entities.Menu.MenuMatchRule.CheckAllNull" /><meta name="Description" content="判断是否所有属性都为null" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta