c# - Roslyn 没有引用 System.Runtime

Question

我正在开展一个项目，我们正在使用 Roslyn 为我们编译一些模板。 现在，当我编译模板时，我在 CompileResult.Diagnostics 中收到多个错误.

错误是:

(21,6): error CS0012: The type 'System.Attribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
(21,6): error CS0012: The type 'System.Type' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

看到这些错误，我假设我没有添加对 System.Runtime 的引用正确组装。但是，在检查加载的程序集之后，这似乎是有序的。

private IEnumerable<MetadataReference> GetGlobalReferences()
{
    var assemblies = new [] 
        {
            typeof(System.Object).Assembly,                         //mscorlib
            typeof(System.Composition.ExportAttribute).Assembly,    //System.Composition (MEF)
            typeof(System.CodeDom.Compiler.CodeCompiler).Assembly,  //System.CodeDom.Compiler
        };

    var refs = from a in assemblies
                select new MetadataFileReference(a.Location);

    return refs.ToList();
}

以及编译本身:

public void Compile(AssemblyFileInfo assemblyInfo)
{
    Parse(assemblyInfo.Files);

    var compilation = CSharpCompilation.Create(assemblyInfo.FilePath, options: new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary))
                        .AddReferences(GetGlobalReferences())
                        .AddSyntaxTrees(assemblyInfo.SourceCodeSyntaxTrees);

    assemblyInfo.CompileResult = compilation.Emit(assemblyInfo.FilePath);
}

我是否遗漏了一些明显的东西？看起来成功编译的所有先决条件都已满足，但显然不是。

作为引用，这是我正在尝试编译的(混淆的)代码:

namespace Project.Rules.Generated
{
    using System;
    using System.Runtime;
    using System.Composition;
    using System.CodeDom.Compiler;

    [Export(typeof(IProject))]
    [GeneratedCode("Project Template Compiler", "1.0")]
    public sealed class ProcessPriorityValue : ProjectConcreteClass
    {
        public override void Execute(ProjectExecutionContext ctx)
        {
            CurrentContext = ctx;
        }
    }
}

编辑 我的搜索有所进步。错误消息中指定的 PublicKeyToken 与 System.Composition 程序集的 PublicKeyToken 匹配。我的猜测是添加所有程序集可能会解决问题。 这是正确的，或者至少是解决方案的一部分。 通过使用 dotPeek，我能够检查不同程序集中存在哪些对象。 有了这些知识，我改变了 GetGlobalReferences()方法:

private IEnumerable<MetadataReference> GetGlobalReferences()
{
    var assemblies = new [] 
        {
            typeof(System.Object).Assembly,                                     //mscorlib
            typeof(System.Composition.ExportAttribute).Assembly,                //System.Composition.AttributeModel
            typeof(System.Composition.Convention.ConventionBuilder).Assembly,   //System.Composition.Convention
            typeof(System.Composition.Hosting.CompositionHost).Assembly,        //System.Composition.Hosting
            typeof(System.Composition.CompositionContext).Assembly,             //System.Composition.Runtime
            typeof(System.Composition.CompositionContextExtensions).Assembly,   //System.Composition.TypedParts
            typeof(System.CodeDom.Compiler.CodeCompiler).Assembly,              //System.CodeDom.Compiler
        };

    var refs = from a in assemblies
                select new MetadataFileReference(a.Location);

    return refs.ToList();
}

如您所见，我现在通过指定程序集中存在的对象来添加所有 System.Composition 程序集。 通过添加 System.Composition.Runtime ，我的编译错误已解决。

但这确实引入了一个不同的错误。您可以自行查看，System.Composition.Runtime 中有一个通用的导出类: public sealed class Export<T> : IDisposable 因此，我现在收到此错误:

(21,6): error CS0404: Cannot apply attribute class 'System.Composition.Export<T>' because it is generic

出于某种原因，代码现在要使用 System.Composition.Runtime.Export<T>而不是 System.Composition.AttributeModel 中定义的 ExportAttribute组装。

edit2

我可以确认上面的代码使用了 System.Composition.Export<T>而不是 ExportAttribute .我通过更改 [Export(typeof(IProject)] 发现了这一点至 [ExportAttribute(typeof(IProject)] .由于此更改，返回了原始错误。 它看起来像程序集 System.Composition.AttributeModel未正确加载/引用，但在检查 compilation 之后，我可以看到程序集被正常引用。

我目前得到的引用程序集是:

+       [0] mscorlib, Version=4.0.0.0, Culture=neutral, PublicKey=00000000000000000400000000000000  Microsoft.CodeAnalysis.AssemblyIdentity
+       [1] System.Composition.AttributedModel, Version=1.0.20.0, Culture=neutral, PublicKey=002400000480000094000000060200000024000052534131000400000100010007d1fa57c4aed9f0a32e84aa0faefd0de9e8fd6aec8f87fb03766c834c99921eb23be79ad9d5dcc1dd9ad236132102900b723cf980957fc4e177108fc607774f29e8320e92ea05ece4e821c0a5efe8f1645c4c0c93c1ab99285d622caa652c1dfad63d745d6f2de5f17e5eaf0fc4963d261c8a12436518206dc093344d5ad293   Microsoft.CodeAnalysis.AssemblyIdentity
+       [2] System.Composition.Convention, Version=1.0.20.0, Culture=neutral, PublicKey=002400000480000094000000060200000024000052534131000400000100010007d1fa57c4aed9f0a32e84aa0faefd0de9e8fd6aec8f87fb03766c834c99921eb23be79ad9d5dcc1dd9ad236132102900b723cf980957fc4e177108fc607774f29e8320e92ea05ece4e821c0a5efe8f1645c4c0c93c1ab99285d622caa652c1dfad63d745d6f2de5f17e5eaf0fc4963d261c8a12436518206dc093344d5ad293    Microsoft.CodeAnalysis.AssemblyIdentity
+       [3] System.Composition.Hosting, Version=1.0.20.0, Culture=neutral, PublicKey=002400000480000094000000060200000024000052534131000400000100010007d1fa57c4aed9f0a32e84aa0faefd0de9e8fd6aec8f87fb03766c834c99921eb23be79ad9d5dcc1dd9ad236132102900b723cf980957fc4e177108fc607774f29e8320e92ea05ece4e821c0a5efe8f1645c4c0c93c1ab99285d622caa652c1dfad63d745d6f2de5f17e5eaf0fc4963d261c8a12436518206dc093344d5ad293   Microsoft.CodeAnalysis.AssemblyIdentity
+       [4] System.Composition.Runtime, Version=1.0.20.0, Culture=neutral, PublicKey=002400000480000094000000060200000024000052534131000400000100010007d1fa57c4aed9f0a32e84aa0faefd0de9e8fd6aec8f87fb03766c834c99921eb23be79ad9d5dcc1dd9ad236132102900b723cf980957fc4e177108fc607774f29e8320e92ea05ece4e821c0a5efe8f1645c4c0c93c1ab99285d622caa652c1dfad63d745d6f2de5f17e5eaf0fc4963d261c8a12436518206dc093344d5ad293   Microsoft.CodeAnalysis.AssemblyIdentity
+       [5] System.Composition.TypedParts, Version=1.0.20.0, Culture=neutral, PublicKey=002400000480000094000000060200000024000052534131000400000100010007d1fa57c4aed9f0a32e84aa0faefd0de9e8fd6aec8f87fb03766c834c99921eb23be79ad9d5dcc1dd9ad236132102900b723cf980957fc4e177108fc607774f29e8320e92ea05ece4e821c0a5efe8f1645c4c0c93c1ab99285d622caa652c1dfad63d745d6f2de5f17e5eaf0fc4963d261c8a12436518206dc093344d5ad293    Microsoft.CodeAnalysis.AssemblyIdentity
+       [6] Microsoft.CSharp, Version=4.0.0.0, Culture=neutral, PublicKey=002400000480000094000000060200000024000052534131000400000100010007d1fa57c4aed9f0a32e84aa0faefd0de9e8fd6aec8f87fb03766c834c99921eb23be79ad9d5dcc1dd9ad236132102900b723cf980957fc4e177108fc607774f29e8320e92ea05ece4e821c0a5efe8f1645c4c0c93c1ab99285d622caa652c1dfad63d745d6f2de5f17e5eaf0fc4963d261c8a12436518206dc093344d5ad293  Microsoft.CodeAnalysis.AssemblyIdentity
+       [7] System, Version=4.0.0.0, Culture=neutral, PublicKey=00000000000000000400000000000000    Microsoft.CodeAnalysis.AssemblyIdentity
+       [8] System.Core, Version=4.0.0.0, Culture=neutral, PublicKey=00000000000000000400000000000000   Microsoft.CodeAnalysis.AssemblyIdentity
+       [9] System.Data, Version=4.0.0.0, Culture=neutral, PublicKey=00000000000000000400000000000000   Microsoft.CodeAnalysis.AssemblyIdentity

Answer 1

应 Dejan 在评论部分的要求，我会将(针对我的问题)的答案作为真实答案发布。

---

我已经找到问题所在了!编译器一直都是正确的。 blog post的 smack0007触发我尝试别的东西。不要使用 Facade dll，而是尝试手动引用必要的 dll。 GetGlobalReferences 方法现在如下所示:

private IEnumerable<MetadataReference> GetGlobalReferences()
{
    var assemblies = new [] 
        {
            /*Making sure all MEF assemblies are loaded*/
            typeof(System.Composition.Convention.AttributedModelProvider).Assembly, //System.Composition.AttributeModel
            typeof(System.Composition.Convention.ConventionBuilder).Assembly,   //System.Composition.Convention
            typeof(System.Composition.Hosting.CompositionHost).Assembly,        //System.Composition.Hosting
            typeof(System.Composition.CompositionContext).Assembly,             //System.Composition.Runtime
            typeof(System.Composition.CompositionContextExtensions).Assembly,   //System.Composition.TypedParts

            /*Used for the GeneratedCode attribute*/
            typeof(System.CodeDom.Compiler.CodeCompiler).Assembly,              //System.CodeDom.Compiler
        };

    var refs = from a in assemblies 
                select new MetadataFileReference(a.Location);
    var returnList = refs.ToList();

    //The location of the .NET assemblies
    var assemblyPath = Path.GetDirectoryName(typeof(object).Assembly.Location);

    /* 
        * Adding some necessary .NET assemblies
        * These assemblies couldn't be loaded correctly via the same construction as above,
        * in specific the System.Runtime.
        */
    returnList.Add(new MetadataFileReference(Path.Combine(assemblyPath, "mscorlib.dll")));
    returnList.Add(new MetadataFileReference(Path.Combine(assemblyPath, "System.dll")));
    returnList.Add(new MetadataFileReference(Path.Combine(assemblyPath, "System.Core.dll")));
    returnList.Add(new MetadataFileReference(Path.Combine(assemblyPath, "System.Runtime.dll")));

    return returnList;
}

在反编译 System.Runtime.dll 时，我还看到了为什么不能以任何其他方式引用它。 dll 是空的，它只包含对其他程序集的一些引用。因此不能以任何其他方式引用此程序集。