Fiddler进行模拟Post提交json数据，总为null解决方式

Request Headers:

User-Agent: Fiddler
Host: localhost:3248
Content-Type: application/json; charset=utf-8  
Content-Length: 63

要加上Content-Type: application/json; charset=utf-8，要不是JSON没效

Request Body

{"UserID":4,"UserName":"Parry","UserEmail":"[email protected]"}

紧记，不要写成这样：[{"UserID":4,"UserName":"Parry","UserEmail":"[email protected]"}]