Most Json parsers don't serialize NaN, because in Javascript, NaN is not a constant. Json.Net, however, does serialize NaN values into NaN, which means it outputs invalid Json; attempting to deserialize this Json will fail with most parsers. (We're deserializing in WebKit.)Most Json parsers don't serialize NaN, because
阅读背景：
在JSON.NET中将NaN值序列化为JSON作为空值
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