RoslynCodeTaskFactory: The task factory "CodeTaskFactory" could not be loaded from the assembly

Steps to reproduce

VS2019 win10 .net core console project v3.1 dotnet --version: 3.1.400-preview-015178

error MSB4175: The task factory “CodeTaskFactory” could not be loaded from the assembly “C:\Users\xx.nuget\packages\roslyncodetaskfactory\1.2.6\build\netstandard1.5\RoslynCodeTaskFactory.dll”. Method not found: ‘System.Xml.XmlNodeType System.Xml.Linq.XObject.get_NodeType()’.

Project file

<UsingTask
    TaskName="CustumCodeTask"
    TaskFactory="CodeTaskFactory"
    AssemblyFile="$(RoslynCodeTaskFactory)"
    Condition=" '$(RoslynCodeTaskFactory)' != '' ">
    <ParameterGroup />
    <Task>
      <Reference Include="System.Xml" />
      <Using Namespace="System" />
      <Using Namespace="System.Collections.Generic" />
      <Using Namespace="System.Xml" />
      <Using Namespace="System.Xml.Linq" />
      <Code Type="Fragment" Language="cs">
        <![CDATA[
			<!--public static void ScriptMain() {-->
				List<string> list = new List<string>();
				list.Add("Happy");
				list.Add("New");
				list.Add("Year");
				Console.WriteLine("Hello MSBuild Community Scripting World.");
				foreach(string s in list)
				{
				  Console.WriteLine(s);
				}
			<!--}-->
			]]>
      </Code>
    </Task>
  </UsingTask>

Command line

dotnet msbuild -v:d -t:CustumCodeTask

Expected behavior

see the messages

Actual behavior

error MSB4175: The task factory “CodeTaskFactory” could not be loaded from the assembly “C:\Users\xx.nuget\packages\roslyncodetaskfactory\1.2.6\build\netstandard1.5\RoslynCodeTaskFactory.dll”. Method not found: ‘System.Xml.XmlNodeType System.Xml.Linq.XObject.get_NodeType()’.

Environment data

msbuild /version output: Microsoft ® Build Engine version 16.6.0+5ff7b0c9e for .NET Framework

16.6.0.22303

OS info: win 10 x64 If applicable, version of the tool that invokes MSBuild (Visual Studio, dotnet CLI, etc):

dev console for VS2019 win10 .net core console project v3.1 (VS2019) dotnet --version: 3.1.400-preview-015178

Issue Analytics

State:
Created 3 years ago
Comments:6 (2 by maintainers)

Top GitHub Comments

1reaction

jeffklcommented, Jul 6, 2020

The RoslynCodeTaskFactory that you’re using is technically from here: https://github.com/jeffkl/RoslynCodeTaskFactory/

I’ve since built it into MSBuild so you don’t need to reference it as a package.

I think you just need to change the name of the task factory to RoslynCodeTaskFactory. The below sample works great:

<Project>
  <UsingTask
    TaskName="CustumCodeTask"
    TaskFactory="RoslynCodeTaskFactory"
    AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll">
    <ParameterGroup />
    <Task>
      <Using Namespace="System" />
      <Using Namespace="System.Collections.Generic" />
      <Using Namespace="System.Xml" />
      <Using Namespace="System.Xml.Linq" />
      <Code Type="Fragment" Language="cs">
        <![CDATA[
				List<string> list = new List<string>();
				list.Add("Happy");
				list.Add("New");
				list.Add("Year");
				Console.WriteLine("Hello MSBuild Community Scripting World.");
				foreach(string s in list)
				{
				  Console.WriteLine(s);
				}
			]]>
      </Code>
    </Task>
  </UsingTask>

  <Target Name="Build">
    <CustumCodeTask />
  </Target>
</Project>

D:\Stuff>msbuild roslyncodetaskfactory.proj
Microsoft (R) Build Engine version 16.7.0-preview-20330-08+96403c598 for .NET Framework
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 7/6/2020 9:24:17 AM.
Hello MSBuild Community Scripting World.
Happy
New
Year

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:00.73

0reactions

Legendscommented, Jul 6, 2020

Ok, it works when I use: