It is not supported to publish an app to a single file without RuntimeIdentifier
Issue Description:
.NET Core build gives below error,
It is not supported to publish an application to a single-file without specifying a RuntimeIdentifier. Please either specify a RuntimeIdentifier or set PublishSingleFile to false.
You might get this error on CLI or using Visual Studio IDE.
Resolution:
The issue I found to be not specifying the runtime identifier in the project file or through the publish command.
When choosing an option to create a single exe file for multiple dll or apps
Runtime identifier using CLI
Please specify the runtime identifier as below,
dotnet publish -r linux-x64 -p:PublishSingleFile=true OR dotnet publish -r win10-x64 -p:PublishSingleFile=true
Runtime identifier using Project File
Here below is sample project file,
For Linux
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp3.0</TargetFramework>
<RuntimeIdentifier>linux-x64</RuntimeIdentifier>
<PublishSingleFile>true</PublishSingleFile>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\ExternalApp1\ExternalApp1.csproj" />
<ProjectReference Include="..\ExternalApp2\ExternalApp2.csproj" />
</ItemGroup>
</Project>
For Windows
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp3.0</TargetFramework>
<RuntimeIdentifier>win10-x64</RuntimeIdentifier>
<PublishSingleFile>true</PublishSingleFile>
</PropertyGroup>
Specify multiple Runtime
You will not be able to specify multiple runtimes while using CLI, However, you can specify commands multiple times for the supported target version.
dotnet publish -r linux-x64 -p:PublishSingleFile=true
Other references:
- Load Multiple DLL as Single Exe in .NET and .NET Core
- Create Self Contained Single Executable (EXE) in .NET Core 3.0
Did the above steps resolve your issue? Please sound off in the comments below!
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