Publish single exe file for win form application

Question

I tried this command:

dotnet publish -r win-x64 -c Release /p:PublishSingleFile=true /p:PublishTrimmed=true /p:IncludeNativeLibrariesForSelfExtract=true --output "C:\Users\Admin\Desktop\Test_zone\TestCompile"

But it outputs:

Nothing to do. None of projects specified contain packages to restore

• This application has been running/built normally
• This is Visual Studio 2019 Community
• This is .NET, not .NET Core
• I have added ClickOnce publish installed
• I added into the project.csproj:

  <PropertyGroup>
      <OutputType>Exe</OutputType>
      <TargetFramework>net5.0</TargetFramework>
      <PublishSingleFile>true</PublishSingleFile>
      <SelfContained>true</SelfContained>
      <RuntimeIdentifier>win-x64</RuntimeIdentifier>
      <PublishReadyToRun>true</PublishReadyToRun>
  </PropertyGroup>
  

I am out of ideas. I have read much about publishing single files but it all seems that there is something very simple that I missed.