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我已经实现了windows service使用.Net Core worker service. 从命令提示符安装服务时出现错误

C:\Windows\Microsoft.NET\Framework64\v4.0.30319>InstallUtil.exe D:\LC\WindowService\L3WorkerService.exe
Microsoft (R) .NET Framework Installation utility Version 4.8.3752.0
Copyright (C) Microsoft Corporation.  All rights reserved.

Exception occurred while initializing the installation:
System.BadImageFormatException: Could not load file or assembly 
'file:///D:\LC\WindowService\L3WorkerService.exe' or one of its dependencies. 
The module was expected to contain an assembly manifest..

我尝试过这两条路径

C:\Windows\Microsoft.NET\Framework64\v4.0.30319>InstallUtil.exe D:\LC\WindowService\L3WorkerService.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319>InstallUtil.exe D:\LC\WindowService\L3WorkerService.exe

这是我的项目信息

• 平台目标 - x86
• 输出类型 - WindowsApplication
• 目标框架 - .NET Core 3.1

我该如何解决这个问题？