当我尝试使用APN构建内容时,我看到了这个代码块.有人可以解释一下,"这个"陈述是做什么的吗?
public ApplePushService(IPushChannelFactory pushChannelFactory, ApplePushChannelSettings channelSettings)
: this(pushChannelFactory, channelSettings, default(IPushServiceSettings))
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它是否像那些参数的默认值?