Roslyn / Find References - Incorrect workspace loading

Question

I am trying to write some code to find all the method calls for any given method, as I am looking to create an open source UML sequence diagram toolkit. However, I am having trouble passing the first few lines of code: /

The API seems to have changed a lot, and I can't imagine how to use it correctly while looking at the code.

When I do this:

var workspace = new CustomWorkspace(); string solutionPath = @"C:\Workspace\RoslynTest\RoslynTest.sln"; var solution = workspace.CurrentSolution; 

I find that workspace.CurrentSolution has 0 projects. I figured this would be equivalent to what Workspace.LoadSolution( string solutionFile ) was earlier, which would then supposedly contain any projects in the solution, but I don't find any success in this way.

I'm terribly confused 0.o

If someone can offer further recommendations on how I can use the FindReferences API to identify all calls to a particular method, that would be very helpful!

Alternatively, would it be better to use a static analysis approach? I would like to support things like lambdas, iterator methods and async.

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Edit -

Here is a complete example based on the accepted answer:

 using System.Linq; using Microsoft.CodeAnalysis.CSharp; using Microsoft.CodeAnalysis.CSharp.Syntax; using Microsoft.CodeAnalysis.MSBuild; using Microsoft.CodeAnalysis.FindSymbols; using System.Diagnostics; namespace RoslynTest { class Program { static void Main(string[] args) { string solutionPath = @"C:\Workspace\RoslynTest\RoslynTest.sln"; var workspace = MSBuildWorkspace.Create(); var solution = workspace.OpenSolutionAsync(solutionPath).Result; var project = solution.Projects.Where(p => p.Name == "RoslynTest").First(); var compilation = project.GetCompilationAsync().Result; var programClass = compilation.GetTypeByMetadataName("RoslynTest.Program"); var barMethod = programClass.GetMembers("Bar").First(); var fooMethod = programClass.GetMembers("Foo").First(); var barResult = SymbolFinder.FindReferencesAsync(barMethod, solution).Result.ToList(); var fooResult = SymbolFinder.FindReferencesAsync(fooMethod, solution).Result.ToList(); Debug.Assert(barResult.First().Locations.Count() == 1); Debug.Assert(fooResult.First().Locations.Count() == 0); } public bool Foo() { return "Bar" == Bar(); } public string Bar() { return "Bar"; } } } 

Answer 1

Customworkspace

A workspace that allows you to manually add projects and documents.

Since you are trying to download the solution, you should use MSBuildWorkspace , which

Workspace that you can fill by opening MSBuild solution and project files.

You can create a new MSBuildWorkspace and call OpenSolutionAsync using solutionPath . For help, see SymbolFinder .

Answer 2

Solutions is the concept of MSBuild.

You need to create MSBuildWorkspace and call OpenSolutionAsync() .

Answer 3

 string solutionPath = @"C:\Workspace\RoslynTest\RoslynTest.sln"; 

creates a local variable. It does not affect your CustomWorkspace object.