How to troubleshoot "HTTP Error 502.5 - Process Failure" with .net core

Programming, error messages and sample code > ASP.NET
Common causes of this issue:
 
The application process failed to start
The application process started but then stopped
The application process started but failed to listen on the configured port
 
Troubleshooting Ways:
 
way1: Enable logging the application process’ stdout messages in web.config
 
e.g. set stdoutLogEnabled to true
<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" />
    </handlers>
    <aspNetCore processPath="dotnet" arguments=".\Test.dll" stdoutLogEnabled="true" stdoutLogFile=".\logs\stdout" />
  </system.webServer>
</configuration>
note: you must create folder "logs" first and grant write permission in order to save log files.
 
way2: enable development mode in web.config
 
e.g
 
<configuration>
  <system.webServer>
    <aspNetCore .....>
      <environmentVariables>
        <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="Development" />
      </environmentVariables>
    </aspNetCore>
  </system.webServer>
</configuration>