C#•14mo ago

✅ is there a way to delete or overwrite a dll during the postbuild event?

I'm trying to do some il weaving as a post build event, and I'd like to either overwrite the old dll, or make a new file and delete the old one, however I always get an IOException (another process is using this file) which I presume comes from msbuild still holding onto the file during the postbuild event. tldr: is there a workaround to allow automatic post build weaving in visual studio that I don't know of or am I missing something edit: here's my current csproj file, without the library references (if they matter I can add them)

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

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <AssemblyName>$(MSBuildProjectName)</AssemblyName>
    <TargetName>$(MSBuildProjectName)unweaved</TargetName>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <DebugType>embedded</DebugType>
  </PropertyGroup>

    <Target Name="PostBuild" AfterTargets="PostBuildEvent">
        <Exec Command="start ..\Velrdid.OpenXR.PostCompilerFixup\bin\Release\net6.0\Veldrid.OpenXR.PostCompilerFixup.exe" />
    </Target>
</Project>

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

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <AssemblyName>$(MSBuildProjectName)</AssemblyName>
    <TargetName>$(MSBuildProjectName)unweaved</TargetName>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <DebugType>embedded</DebugType>
  </PropertyGroup>

    <Target Name="PostBuild" AfterTargets="PostBuildEvent">
        <Exec Command="start ..\Velrdid.OpenXR.PostCompilerFixup\bin\Release\net6.0\Veldrid.OpenXR.PostCompilerFixup.exe" />
    </Target>
</Project>

2 Replies

Accord•14mo ago

Looks like nothing has happened here. I will mark this as stale and this post will be archived until there is new activity.

RT0405OP•14mo ago

I found a work around using msbuild tasks to move and delete the old one

<Target Name="PostBuild" AfterTargets="PostBuildEvent">
    <ItemGroup>
        <DLLName Include="$(OutDir)$(MSBuildProjectName).dll" />
    </ItemGroup>
    <Move SourceFiles="@(DLLName)" DestinationFiles="@(DLLName -> Replace('dll', 'dll2'))" />
    <Exec Command="start ..\Velrdid.OpenXR.PostCompilerFixup\bin\Release\net6.0\Veldrid.OpenXR.PostCompileFixup.exe"/>
    <Delete Files="@(DLLName -> Replace('dll', 'dll2'))" />
</Target>

<Target Name="PostBuild" AfterTargets="PostBuildEvent">
    <ItemGroup>
        <DLLName Include="$(OutDir)$(MSBuildProjectName).dll" />
    </ItemGroup>
    <Move SourceFiles="@(DLLName)" DestinationFiles="@(DLLName -> Replace('dll', 'dll2'))" />
    <Exec Command="start ..\Velrdid.OpenXR.PostCompilerFixup\bin\Release\net6.0\Veldrid.OpenXR.PostCompileFixup.exe"/>
    <Delete Files="@(DLLName -> Replace('dll', 'dll2'))" />
</Target>

and the il weaver reads from the dll2 file and outputs to a normal dll with the same name

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✅ is there a way to delete or overwrite a dll during the postbuild event?