Load the solution in which the Stand-Alone code Analyser is being written

Question

I was trying to write an analyser to get information about some methods using the roslyn syntax tree. The problem is: The analyser that I am writing, needs to be in the same solution as the solution that I want to analyse. So, this is my code:

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

public static class Main
{

    public static Solution solution { get; set; } = null;

    public static string GetMethodInfo(string methodToFind)
    {

        Task<Solution> GetSolutionTask = null;
        string namespaceToFind, classToFind, methodToFind, invocationToFind;
        if (solution == null)
        {
            var workspace = Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace.Create();
            GetSolutionTask = workspace.OpenSolutionAsync(Config.SolutionPath);
        }
        if (GetSolutionTask != null) solution = GetSolutionTask.Result;
        foreach (Project proj in solution.Projects)
        {
            Compilation compilation = proj.GetCompilationAsync().Result;
            foreach (var tree in compilation.SyntaxTrees)
            {
                findMethodAndProcessIt()...
            }
        }
        return String.Empty;
    }
}

The problem I get is that no compilation has any syntax tree. I tried this same code by opening other solutions and it works. So clearly the problem here is to be trying to open the solution that the visual studio is using. I have already tried to run this code with visual studio closed, only running the .exe , but the problem persists. Do you have any idea on how to solve this?

Answer 1

You are using MSBuildWorkspace to open a solution. Typically, when use of MSBuildWorkspace leads to projects not being loaded correctly, no source files, etc, there has been a failure during msbuild processing. This usually happens when your application does not have the same binding redirects in its app.config file that msbuild uses (in msbuild.exe.config), which causes some custom tasks/extensions to fail to load due to versioning mismatch.

You'll want to copy the <assemblyBinding> section into your app.config.