Roslyn INamedTypeSymbol.GetMembers() 在 Roslyn API 上抛出 Method Not Found 异常答案

【问题标题】：Roslyn INamedTypeSymbol.GetMembers() throws Method Not Found Exception on Roslyn APIRoslyn INamedTypeSymbol.GetMembers() 在 Roslyn API 上抛出 Method Not Found 异常
【发布时间】：2018-04-05 12:39:25
【问题描述】：

我正在尝试使用 Roslyn 导航到方法声明。我有命名空间名称、类名和方法名。在下面的代码示例中，我能够填充 classReference 变量。但是，一旦调用 classReference.GetMembers()，我就会收到 Method Not Found 异常。虽然当我在中间窗口（Visual Studio 调试模式）中执行 classReference.GetMembers() 时，它给了我正确的方法名称。

public async void NavigateToMethod(string className, string methodName)
    {
        Microsoft.CodeAnalysis.Solution sol = Workspace.CurrentSolution;
        foreach (Microsoft.CodeAnalysis.Project project in sol.Projects)
        {
            bool found = false;

            Compilation compilation = await project.GetCompilationAsync();
            INamedTypeSymbol classReference = compilation.GetTypeByMetadataName(className);
            List<ISymbol> l = classReference.GetMembers().ToList<ISymbol>();
            Debug.WriteLine(l);



            foreach (ISymbol isymbol in classReference.GetMembers(methodName))
            {
                IMethodSymbol methodSymbol = isymbol as IMethodSymbol;
                CancellationTokenSource cts = new CancellationTokenSource();
                if (Workspace.TryGoToDefinition(methodSymbol, project, cts.Token))
                {
                    found = true;
                    break;
                }
            }
            if (found)
            {
                break;
            }
        }
    }

例外 System.MissingMethodException

HResult=0x80131513

Message=找不到方法：'System.Collections.Immutable.ImmutableArray`1 Microsoft.CodeAnalysis.INamespaceOrTypeSymbol.GetMembers()'。

这令人困惑。当我查看 Microsoft.CodeAnalysis.INamespaceOrTypeSymbol 文档时，GetMembers() 方法存在（公共）并且我正在引用具有此方法的程序集，它在运行时也可用。

请注意 classReference.GetMembers(methodName) 仅适用于中间窗口，不知道发生了什么。

package.config

<packages>
  <package id="Microsoft.CodeAnalysis" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.CodeAnalysis.Analyzers" version="2.6.0" targetFramework="net461" developmentDependency="true" />
  <package id="Microsoft.CodeAnalysis.Common" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.CodeAnalysis.CSharp" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.CodeAnalysis.CSharp.Workspaces" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.CodeAnalysis.VisualBasic" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.CodeAnalysis.VisualBasic.Workspaces" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.CodeAnalysis.Workspaces.Common" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.Composition" version="1.0.31" targetFramework="net461" />
  <package id="Microsoft.Net.Compilers" version="2.7.0" targetFramework="net461" developmentDependency="true" />
  <package id="Microsoft.VisualStudio.CoreUtility" version="15.6.27740" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.ImageCatalog" version="15.6.27413" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Imaging" version="15.6.27413" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.LanguageServices" version="2.7.0" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.OLE.Interop" version="7.10.6071" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.SDK.EmbedInteropTypes" version="15.0.16" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.15.0" version="15.6.27413" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Framework" version="15.6.27413" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop" version="7.10.6072" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop.10.0" version="10.0.30320" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop.11.0" version="11.0.61031" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop.12.0" version="12.0.30111" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop.15.3.DesignTime" version="15.0.26929" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop.15.6.DesignTime" version="15.6.27413" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop.8.0" version="8.0.50728" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Shell.Interop.9.0" version="9.0.30730" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Text.Data" version="15.6.27413" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.TextManager.Interop" version="7.10.6071" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.TextManager.Interop.8.0" version="8.0.50728" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Threading" version="15.6.46" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Threading.Analyzers" version="15.6.46" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Utilities" version="15.6.27413" targetFramework="net461" />
  <package id="Microsoft.VisualStudio.Validation" version="15.3.32" targetFramework="net461" />
  <package id="Microsoft.VSSDK.BuildTools" version="15.6.170" targetFramework="net461" developmentDependency="true" />
  <package id="Newtonsoft.Json" version="6.0.6" targetFramework="net461" />
  <package id="StreamJsonRpc" version="1.2.8" targetFramework="net461" />
  <package id="System.AppContext" version="4.3.0" targetFramework="net46" />
  <package id="System.Collections" version="4.3.0" targetFramework="net46" />
  <package id="System.Collections.Concurrent" version="4.3.0" targetFramework="net46" />
  <package id="System.Collections.Immutable" version="1.5.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Composition" version="1.2.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Composition.AttributedModel" version="1.2.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Composition.Convention" version="1.2.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Composition.Hosting" version="1.2.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Composition.Runtime" version="1.2.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Composition.TypedParts" version="1.2.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Console" version="4.3.0" targetFramework="net46" />
  <package id="System.Diagnostics.Debug" version="4.3.0" targetFramework="net46" />
  <package id="System.Diagnostics.FileVersionInfo" version="4.3.0" targetFramework="net46" />
  <package id="System.Diagnostics.StackTrace" version="4.3.0" targetFramework="net46" />
  <package id="System.Diagnostics.Tools" version="4.3.0" targetFramework="net46" />
  <package id="System.Dynamic.Runtime" version="4.3.0" targetFramework="net46" />
  <package id="System.Globalization" version="4.3.0" targetFramework="net46" />
  <package id="System.IO.Compression" version="4.3.0" targetFramework="net46" />
  <package id="System.IO.FileSystem" version="4.3.0" targetFramework="net46" />
  <package id="System.IO.FileSystem.Primitives" version="4.3.0" targetFramework="net46" />
  <package id="System.Linq" version="4.3.0" targetFramework="net46" />
  <package id="System.Linq.Expressions" version="4.3.0" targetFramework="net46" />
  <package id="System.Reflection" version="4.3.0" targetFramework="net46" />
  <package id="System.Reflection.Metadata" version="1.6.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Reflection.Primitives" version="4.3.0" targetFramework="net461" />
  <package id="System.Resources.ResourceManager" version="4.3.0" targetFramework="net46" />
  <package id="System.Runtime" version="4.3.0" targetFramework="net46" />
  <package id="System.Runtime.Extensions" version="4.3.0" targetFramework="net46" />
  <package id="System.Runtime.Handles" version="4.3.0" targetFramework="net461" />
  <package id="System.Runtime.InteropServices" version="4.3.0" targetFramework="net46" />
  <package id="System.Runtime.Numerics" version="4.3.0" targetFramework="net46" />
  <package id="System.Security.Cryptography.Algorithms" version="4.3.1" targetFramework="net461" />
  <package id="System.Security.Cryptography.Encoding" version="4.3.0" targetFramework="net46" />
  <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net46" />
  <package id="System.Security.Cryptography.X509Certificates" version="4.3.2" targetFramework="net461" />
  <package id="System.Text.Encoding" version="4.3.0" targetFramework="net46" />
  <package id="System.Text.Encoding.CodePages" version="4.5.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net46" />
  <package id="System.Threading" version="4.3.0" targetFramework="net46" />
  <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net46" />
  <package id="System.Threading.Tasks.Parallel" version="4.3.0" targetFramework="net46" />
  <package id="System.Threading.Thread" version="4.3.0" targetFramework="net46" />
  <package id="System.ValueTuple" version="4.5.0-preview1-26216-02" targetFramework="net461" />
  <package id="System.Xml.ReaderWriter" version="4.3.1" targetFramework="net461" />
  <package id="System.Xml.XDocument" version="4.3.0" targetFramework="net46" />
  <package id="System.Xml.XmlDocument" version="4.3.0" targetFramework="net46" />
  <package id="System.Xml.XPath" version="4.3.0" targetFramework="net46" />
  <package id="System.Xml.XPath.XDocument" version="4.3.0" targetFramework="net46" />
</packages>

【问题讨论】：

如果您混合 Roslyn 版本，就会发生这种情况。
我使用的是 2.7.0 版本 - 添加了 packages.config 文件内容
运行时加载哪些版本？（调试，模块）
在调试中它正在加载版本 2.7.0, 'devenv.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Community \Common7\IDE\CommonExtensions\Microsoft\ManagedLanguages\VBCSharp\LanguageServices\Microsoft.CodeAnalysis.dll'。跳过加载符号。模块已优化，调试器选项“仅我的代码”已启用。
prntscr.com/j0x01q 加载的模块

标签： c# roslyn

【解决方案1】：

问题是 System.Collections.Immutable 版本，我使用的是 1.5.0-preview，因为我点击了 nuget 包管理器 UI 中的全部更新。

<package id="System.Collections.Immutable" version="1.5.0-preview1-26216-02" targetFramework="net461" />

我将 System.Collections.Immutable 降级到 1.3.1 版后，异常就消失了。

【讨论】：