I'm trying to decompile ASP.NET Core WebApi project and gather all methods from all controllers. When my project targeted .NETCore3.1 it worked by running this code:

Assembly assembly = Assembly.LoadFrom(assemblyPath); // assemblyPath pointed to .dll
var types = assembly.GetExportedTypes();

But after updating to .NET5, the second line (assembly.GetExportedTypes()) from above throws an exception that file Microsoft.AspNetCore.Mvc.Core.dll is missing. When I copied that file manually from an old project (compiled as .NETCore3.1), it worked!

On the top of that, when project is more complicated, has EFCore dependency and more... more files are missing when compiling the project under .NET5. These are:

• Microsoft.Extensions.Hosting.Abstractions.dll
• Microsoft.AspNetCore.Mvc.Abstractions.dll
• Microsoft.AspNetCore.Authentication.Abstractions.dll

I have two questions:

• Why these files are not copied to the output folder?
• How can I properly read all endpoints/methods in Controllers having complied binaries of the ASP.NET WebApi? Am I doing something wrong?

Steps to reproduce:

• Create ASP.NET Core WebApi project targeting .NET5.
• Create other project that targets .NET5 and implement these two lines:

var assemblyPath = "C:\\Projects\\Other\\DotNet5Test\\DotNet5Test\\DotNet5Test.WebApi\\bin\\Debug\\net5.0\\DotNet5Test.WebApi.dll";
Assembly assembly = Assembly.LoadFrom(assemblyPath); 
var types = assembly.GetExportedTypes();

• Run it

EDIT:

I tried adding Microsoft.AspNetCore.Mvc.Core from nuget, but Microsoft.AspNetCore.Mvc.Core.dll is not being added to the output folder

CodePudding user response：

I've had similar issues sporadically with various projects in the past. The most reliable solution for me has been to install any problematic libraries through the nuget packet manager. Remove any dependency files you manually added before doing this.

CodePudding user response：

I think the issue is that Microsoft.AspNetCore.Mvc.Core.dll ships as part of the framework-dependent deployment (FDD) rather than self-contained deployment (SCD) see the accepted answer Is there any GAC equivalent for .NET Core?.

Given I saw this question of yours posted earlier, How to retrieve Controller methods from WebApi binaries? I have a feeling you are trying to execute the code from a wpf application targeting .net 5 but the app is not able to use FDD to resolve the assembly.

The answer may be that you need to change your webapi app to use an SCD deployment model, but not having used SCD for web apps perhaps google will help.