c# - 当引用的程序集同时引用 mscorlib 2.0.5.0 和 4.0.0.0 时如何让 roslyn 进行编译

Question

我正在动态构建一个使用 Microsoft.OData.Client 的类，此库引用了 mscorlib 2.0.5.0(我猜是 PCL)和 4.0.0.0。

我想用 roslyn 编译我的类，作为更大程序的一部分，但我似乎无法让它工作。我的 Roslyn 编译器代码非常简约

SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(s);
            string assemblyName = Path.GetRandomFileName();

            List<MetadataReference> references = new List<MetadataReference>()
            {
                MetadataReference.CreateFromFile(typeof(DataServiceActionQuery).Assembly.Location),
                MetadataReference.CreateFromFile(typeof(ODataAction).Assembly.Location),
                MetadataReference.CreateFromFile(typeof(GeneratedCodeAttribute).Assembly.Location),
                MetadataReference.CreateFromFile(typeof(IEdmModel).Assembly.Location),
                MetadataReference.CreateFromFile(typeof(TimeOfDay).Assembly.Location),
                MetadataReference.CreateFromFile(typeof(object).Assembly.Location),
                MetadataReference.CreateFromFile(typeof(Enumerable).Assembly.Location),
                MetadataReference.CreateFromFile(typeof(XmlDocument).Assembly.Location),
               // MetadataReference.CreateFromFile(@"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETPortable\v4.0\Profile\Profile328\mscorlib.dll")

            };

            references.AddRange(Directory.GetFiles(@"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades").Select(f => MetadataReference.CreateFromFile(f)));

            var op = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);
            //op.WithAssemblyIdentityComparer(DesktopAssemblyIdentityComparer.Default);
            //CSharpCompilationOptions.WithAssemblyIdentityComparer(DesktopAssemblyIdentityComparer.Default);
            CSharpCompilation compilation = CSharpCompilation.Create(
                assemblyName,
                syntaxTrees: new[] { syntaxTree },
                references: references,
                options: op);
            Assembly assembly = null;
            using (var ms = new MemoryStream())
            {
                EmitResult result = compilation.Emit(ms);

                if (!result.Success)
                {
                    IEnumerable<Diagnostic> failures = result.Diagnostics.Where(diagnostic =>
                        //diagnostic.IsWarningAsError ||
                        diagnostic.Severity == DiagnosticSeverity.Error);

                    foreach (Diagnostic diagnostic in failures)
                    {
                        Console.Error.WriteLine("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
                    }
                }
                else
                {
                    ms.Seek(0, SeekOrigin.Begin);
                    assembly = Assembly.Load(ms.ToArray());                 
                }
        }

这些是我得到的错误

CS0012: The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e, Retargetable=Yes'.

CS0012: The type 'XmlReader' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Xml, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e, Retargetable=Yes'.

Answer 1

正如您在评论中预测的那样，DesktopAssemblyIdentityComparer 是解决方案。但是，CSharpCompilationOptions 是不可变的，WithAssemblyIdentityComparer 方法返回一个新实例，因此您必须像这样使用它:

var op = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);
op = op.WithAssemblyIdentityComparer(DesktopAssemblyIdentityComparer.Default);
CSharpCompilation compilation = CSharpCompilation.Create(
    assemblyName,
    syntaxTrees: new[] { syntaxTree },
    references: references,
    options: op);