cake: System.Data.SqlClient in Cake.CoreCLR Assembly Load Error

What You Are Seeing?

When referencing System.Data.SqlClient in my Cake file, I get the following exception when run from the global tool in a Docker container:

Assembly with same name is already loaded

When running from Windows (build.ps1), the reference isn’t needed, and even when present, causes no issues.

I asked for assistance in the chat, and was directed here.

What is Expected?

The Cake script should compile.

What version of Cake are you using?

dotnet core global tool 0.30.0

Are you running on a 32 or 64 bit system?

64-bit

What environment are you running on? Windows? Linux? Mac?

Docker (Linux on Windows) microsoft/dotnet:2.1.400-sdk-stretch

Are you running on a CI Server? If so, which one?

No

How Did You Get This To Happen? (Steps to Reproduce)

In my build.cake file:

#addin "nuget:?package=System.Data.SqlClient&version=4.5.0"
#addin "nuget:?package=Cake.Docker&version=0.9.6"
#addin "nuget:?package=dbup-core&version=4.1.0"
#addin "nuget:?package=dbup-sqlserver&version=4.1.0"

In my Docker file:

FROM microsoft/dotnet:2.1.400-sdk-stretch AS build-env

WORKDIR /app
COPY ./ ./
ENV PATH="/root/.dotnet/tools:${PATH}"
RUN dotnet tool install -g Cake.Tool --version 0.30.0
RUN dotnet cake build.cake

Output Log

root@dc8cbcdce3b2:/app# dotnet cake build.cake -v=Diagnostic
Module directory does not exist.
NuGet.config not found.
Analyzing build script...
Analyzing /app/build.cake...
Processing build script...
Installing tools...
Retrieving package 'ReportGenerator 4.0.0-rc4' from '/root/.nuget/packages/'.
Package ReportGenerator.4.0.0-rc4 has already been installed.
Successfully installed 'ReportGenerator 4.0.0-rc4' to /app/tools
Executing nuget actions took 68.73 ms
Installing addins...
Found package 'System.Data.SqlClient 4.5.0' in '/app/tools/Addins'.
Package System.Data.SqlClient.4.5.0 has already been installed.
Successfully installed 'System.Data.SqlClient 4.5.0' to /app/tools/Addins
Executing nuget actions took 2.18 ms
The addin System.Data.SqlClient will reference System.Data.SqlClient.dll.
The addin System.Data.SqlClient will reference System.Data.SqlClient.dll.
The addin System.Data.SqlClient will reference System.Data.SqlClient.dll.
Found package 'Cake.Docker 0.9.6' in '/app/tools/Addins'.
Package Cake.Docker.0.9.6 has already been installed.
Successfully installed 'Cake.Docker 0.9.6' to /app/tools/Addins
Executing nuget actions took 0.46 ms
The addin Cake.Docker will reference Cake.Docker.dll.
Found package 'dbup-core 4.1.0' in '/app/tools/Addins'.
Package dbup-core.4.1.0 has already been installed.
Successfully installed 'dbup-core 4.1.0' to /app/tools/Addins
Executing nuget actions took 0.65 ms
The addin dbup-core will reference dbup-core.dll.
Found package 'dbup-sqlserver 4.1.0' in '/app/tools/Addins'.
Package dbup-sqlserver.4.1.0 has already been installed.
Successfully installed 'dbup-sqlserver 4.1.0' to /app/tools/Addins
Executing nuget actions took 0.57 ms
The addin dbup-sqlserver will reference dbup-sqlserver.dll.
Verifying assembly 'System.Data.SqlClient, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
Error: System.IO.FileLoadException: Assembly with same name is already loaded
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromPath(IntPtr ptrNativeAssemblyLoadContext, String ilPath, String niPath, ObjectHandleOnStack retAssembly)
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyPath(String assemblyPath)
   at System.Reflection.Assembly.LoadFrom(String assemblyFile)
   at Cake.Core.Reflection.AssemblyLoader.Load(FilePath path, Boolean verify) in C:\projects\cake\src\Cake.Core\Reflection\AssemblyLoader.cs:line 31
   at Cake.Core.Scripting.ScriptRunner.Run(IScriptHost host, FilePath scriptPath, IDictionary`2 arguments) in C:\projects\cake\src\Cake.Core\Scripting\ScriptRunner.cs:line 171
   at Cake.Commands.BuildCommand.Execute(CakeOptions options) in C:\projects\cake\src\Cake\Commands\BuildCommand.cs:line 41
   at Cake.CakeApplication.Run(CakeOptions options) in C:\projects\cake\src\Cake\CakeApplication.cs:line 45
   at Cake.Program.Main() in C:\projects\cake\src\Cake\Program.cs:line 73