This is a sample code that can be used to find references using Roslyn version Microsoft.CodeAnalysis 1.0.0

ReferenceFinder.cs

    class ReferenceFinder
    {
        public void Find(string methodName)
        {

            string solutionPath = @"C:\Users\achoudhary\Documents\Visual Studio 2013\Projects\ConsoleForEverything\ConsoleForEverything.sln";
            var msWorkspace = MSBuildWorkspace.Create();

            List<ReferencedSymbol> referencesToMethod = new List<ReferencedSymbol>();
            Console.WriteLine("Searching for method \"{0}\" reference in solution {1} ", methodName, Path.GetFileName(solutionPath));
            ISymbol methodSymbol = null;
            bool found = false;

            //You must install the MSBuild Tools or this line will throw an exception.

            var solution = msWorkspace.OpenSolutionAsync(solutionPath).Result;
            foreach (var project in solution.Projects)
            {
                foreach (var document in project.Documents)
                {
                    var model = document.GetSemanticModelAsync().Result;

                    var methodInvocation = document.GetSyntaxRootAsync().Result;
                    InvocationExpressionSyntax node = null;
                    try
                    {
                        node = methodInvocation.DescendantNodes().OfType<InvocationExpressionSyntax>()
                         .Where(x => ((MemberAccessExpressionSyntax)x.Expression).Name.ToString() == methodName).FirstOrDefault();

                        if (node == null)
                            continue;
                    }
                    catch(Exception exception)
                    {
                        // Swallow the exception of type cast. 
                        // Could be avoided by a better filtering on above linq.
                        continue;
                    }

                    methodSymbol = model.GetSymbolInfo(node).Symbol;
                    found = true;
                    break;
                }

                if (found) break;
            }

            foreach (var item in SymbolFinder.FindReferencesAsync(methodSymbol, solution).Result)
            {
                foreach (var location in item.Locations)
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("Project Assembly -> {0}", location.Document.Project.AssemblyName);
                    Console.ResetColor();
                }

            }

            Console.WriteLine("Finished searching. Press any key to continue....");
        }
    }
}

Invoking SymbolFinder.FindReferencesAsync(methodSymbol, solution).Result throws an exception An item with the same key has already been added.

Microsoft.CodeAnalysis version="2.6.1"

Can we get line number from this method