WinformsApp1/WinFormsApp1/WinFormsApp1.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net48</TargetFramework>
    <UseWindowsForms>true</UseWindowsForms>
    <AssemblyName>ExcelMerger</AssemblyName>
    <RootNamespace>ExcelMerger</RootNamespace>
    <!-- 用于单文件发布的配置 -->
    <PublishSingleFile>false</PublishSingleFile>
    <SelfContained>false</SelfContained>
    <PublishReadyToRun>true</PublishReadyToRun>
    <!-- 强制将所有依赖项合并到输出目录 -->
    <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="EPPlus" Version="4.5.3.3" />
    <!-- 用于ILMerge合并依赖项 -->
    <PackageReference Include="ILRepack" Version="2.0.18" />
  </ItemGroup>

  <!-- ILMerge后处理脚本 -->
  <Target Name="ILRepack" AfterTargets="Build">
    <ItemGroup>
      <InputAssemblies Include="$(OutputPath)$(AssemblyName).exe" />
      <InputAssemblies Include="$(OutputPath)EPPlus.dll" />
    </ItemGroup>
    <Message Text="ILRepack merging..." Importance="high" />
    <Exec Command="$(PkgILRepack)\tools\ILRepack.exe /target:exe /out:$(OutputPath)$(AssemblyName)_merged.exe @(InputAssemblies-&gt;'%(FullPath)', ' ')" />
    <Message Text="ILRepack merge complete: $(OutputPath)$(AssemblyName)_merged.exe" Importance="high" />
  </Target>

</Project>