usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Net.Http;usingSystem.Text;usingSystem.Threading.Tasks;usingNewtonsoft.Json;namespaceConsoleApplication4{classProgram{staticvoidMain(string[]args){CreateHttpRequestMessage();}publicstaticHttpRequestMessageCreateHttpRequestMessage(){HttpRequestMessagerequestMessage=newHttpRequestMessage();JsonHSBCMailMessageJsonHsbcMailMessage=newJsonHSBCMailMessage{Host="host111",Port=1231312312};stringBody=JsonConvert.SerializeObject(JsonHsbcMailMessage);requestMessage.Content=newStringContent(Body,Encoding.UTF8,"application/x-www-form-urlencoded");returnrequestMessage;}}classJsonHSBCMailMessage{publicstringHost{get;set;}publicintPort{get;set;}}}


*Newtonsoft.Json 需要自己下载并加载到引用列表