为什么POST和PUT ReadAsAsync（）为null，但ReadAsStringAsync（）已填充？ AKA“如何关闭Chunking？”

I have a Web API project that has a few dozen RESTful methods, split about evenly between GETs, POSTs and PUTs. The system uses Entity Framework objects and Newtonsoft's JSON from Nuget (version 9.0.1).I have a Web API project that has a few dozen R