https://docs.microsoft.com/zh-cn/dotnet/framework/network-programming/enabling-network-tracing
启用网络跟踪
// 在App.config 配置如下,主要是"<system.diagnostics> "这节,就会在程序目录生成network.log文件,记录所有请求
<configuration>
<system.diagnostics>
<sources>
<source name="System.Net" tracemode="includehex" maxdatasize="1024">
<listeners>
<add name="System.Net"/>
</listeners>
</source>
<source name="System.Net.Cache">
<listeners>
<add name="System.Net"/>
</listeners>
</source>
<source name="System.Net.Http">
<listeners>
<add name="System.Net"/>
</listeners>
</source>
<source name="System.Net.Sockets">
<listeners>
<add name="System.Net"/>
</listeners>
</source>
<source name="System.Net.WebSockets">
<listeners>
<add name="System.Net"/>
</listeners>
</source>
</sources>
<switches>
<add name="System.Net" value="Verbose"/>
<add name="System.Net.Cache" value="Verbose"/>
<add name="System.Net.Http" value="Verbose"/>
<add name="System.Net.Sockets" value="Verbose"/>
<add name="System.Net.WebSockets" value="Verbose"/>
</switches>
<sharedListeners>
<add name="System.Net"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="network.log"
traceOutputOptions="ProcessId, DateTime"
/>
</sharedListeners>
<trace autoflush="true"/>
</system.diagnostics>
</configuration>
原文：https://www.cnblogs.com/16win-cn/p/15225945.html