MSBuild snippet to disable the default DLL output of a C# class library project

Sample.csproj

<Project>

  <!-- the usual stuff -->

  <!-- BEGIN disable default compile and copy binary behaviour -->
  <Target Name="CoreCompile" />
  <PropertyGroup>
    <SkipCopyBuildProduct>true</SkipCopyBuildProduct>
  </PropertyGroup>
  <!-- END disable default compile and copy binary behaviour -->
</Project>

For a Core project you might want to add the following to prevent the .deps.json file from being created:
<GenerateDependencyFile>False</GenerateDependencyFile>

<GenerateDependencyFile>False%lt;/GenerateDependencyFile> does nothing.

Note you may also want to turn of debug symbols to also stop generation of a .pdb file.

EDIT: and if you're doing that, use the following code, both need these values:

    <DebugSymbols>false</DebugSymbols>
    <DebugType>none</DebugType>

Full .csproj example as non dll complie project:

<Project Sdk="Microsoft.Build.NoTargets/3">
  <PropertyGroup>
    <!-- Required, for your target platform -->
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>

  <!-- Belows you want to do anything, here is work for publish multiple project -->
  <Target Name="PublishAll" AfterTargets="publish" >
    <MSBuild Projects="Other_Project_Path_You_Want_1.csproj"
             Targets="Publish"
             Properties="PublishDir=$(MSBuildProjectDirectory)\$(PublishDir)ProjectOutput1\" />
    <MSBuild Projects="Other_Project_Path_You_Want_2.csproj"
             Targets="Publish"
             Properties="PublishDir=$(MSBuildProjectDirectory)\$(PublishDir)ProjectOutput2\" />
  </Target>

</Project>

Alternative solution if the above not work:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <!-- Required, for your target platform -->
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <!-- no .deps.json file -->
    <GenerateDependencyFile>false</GenerateDependencyFile>
    <!-- no .pdb file -->
    <DebugSymbols>false</DebugSymbols>
    <DebugType>none</DebugType>
  </PropertyGroup>

  <!-- import build target before to override Publish and Build targets in default -->
  <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
  <!-- override build or publish, won't generate dll file -->
  <Target Name="Publish" />
  <Target Name="Build" />

  <!-- Belows you want to do anything, here is work for publish multiple project -->
  <Target Name="PublishAll" AfterTargets="publish" >
    <MSBuild Projects="Other_Project_You_Want_1.csproj"
             Targets="Publish"
             Properties="PublishDir=$(MSBuildProjectDirectory)\$(PublishDir)ProjectOutput1\" />
    <MSBuild Projects="Other_Project_You_Want_2.csproj"
             Targets="Publish"
             Properties="PublishDir=$(MSBuildProjectDirectory)\$(PublishDir)ProjectOutput2\" />
  </Target>

</Project>