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asp.net-core.net-core

.NET Core locking files

I have a ASP.NET Core app. I run the application by running the command 

dotnet run

I'm seeing the following error in one out of five situations when I build this ASP.NET Core app.

C:...\error CS2012: Cannot open 'C:...\bin\Debug\netcoreapp1.0\AAA.Web.dll' for writing -- 'The process cannot access the file 'C:...\bin\Debug\netcoreapp1.0\AAA.Web.dll' because it is being used by another process.'

In addition to the above issue, I also see no updates that I make in the CSHTML file. I have to stop the dotnet run command, build the app again and then run the dotnet run command.

How can I fix these issues?

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Solution

  • This may also help when running your aspnetcore app in IIS.

    Add the following to your csproj:

      <Target Name="PreBuild" BeforeTargets="PreBuildEvent">
    <Exec Command="echo &quot;App Offline&quot; /a &gt; &quot;$(ProjectDir)app_offline.htm&quot;" />
  </Target>

  <Target Name="PostBuild" AfterTargets="PostBuildEvent">
    <Exec Command="del &quot;$(ProjectDir)app_offline.htm&quot;" />
  </Target>