public static async Task<ImmutableDictionary<Project, ImmutableArray<Diagnostic>>> GetProjectDiagnosticsToFixAsync(FixAllContext fixAllContext)
        {
            var project = fixAllContext.Project;
            if (project != null)
            {
                switch (fixAllContext.Scope)
                {
                case FixAllScope.Project:
                    var diagnostics = await fixAllContext.GetProjectDiagnosticsAsync(project).ConfigureAwait(false);
                    return ImmutableDictionary<Project, ImmutableArray<Diagnostic>>.Empty.SetItem(project, diagnostics);

                case FixAllScope.Solution:
                    var projectsAndDiagnostics = new ConcurrentDictionary<Project, ImmutableArray<Diagnostic>>();
                    var options = new ParallelOptions() { CancellationToken = fixAllContext.CancellationToken };
                    Parallel.ForEach(project.Solution.Projects, options, proj =>
                    {
                        fixAllContext.CancellationToken.ThrowIfCancellationRequested();
                        var projectDiagnosticsTask = fixAllContext.GetProjectDiagnosticsAsync(proj);
                        projectDiagnosticsTask.Wait(fixAllContext.CancellationToken);
                        var projectDiagnostics = projectDiagnosticsTask.Result;
                        if (projectDiagnostics.Any())
                        {
                            projectsAndDiagnostics.TryAdd(proj, projectDiagnostics);
                        }
                    });

                    return projectsAndDiagnostics.ToImmutableDictionary();
                }
            }

            return ImmutableDictionary<Project, ImmutableArray<Diagnostic>>.Empty;
        }
            internal virtual async Task <ImmutableDictionary <Project, ImmutableArray <Diagnostic> > > GetProjectDiagnosticsToFixAsync(
                FixAllContext fixAllContext)
            {
                using (Logger.LogBlock(
                           FunctionId.CodeFixes_FixAllOccurrencesComputation_Project_Diagnostics,
                           FixAllLogger.CreateCorrelationLogMessage(fixAllContext.State.CorrelationId),
                           fixAllContext.CancellationToken))
                {
                    var project = fixAllContext.Project;
                    if (project != null)
                    {
                        switch (fixAllContext.Scope)
                        {
                        case FixAllScope.Project:
                            var diagnostics = await fixAllContext.GetProjectDiagnosticsAsync(project).ConfigureAwait(false);

                            var kvp = SpecializedCollections.SingletonEnumerable(KeyValuePairUtil.Create(project, diagnostics));
                            return(ImmutableDictionary.CreateRange(kvp));

                        case FixAllScope.Solution:
                            var projectsAndDiagnostics = ImmutableDictionary.CreateBuilder <Project, ImmutableArray <Diagnostic> >();

                            var tasks = project.Solution.Projects.Select(async p => new
                            {
                                Project     = p,
                                Diagnostics = await fixAllContext.GetProjectDiagnosticsAsync(p).ConfigureAwait(false)
                            }).ToArray();

                            await Task.WhenAll(tasks).ConfigureAwait(false);

                            foreach (var task in tasks)
                            {
                                var projectAndDiagnostics = await task.ConfigureAwait(false);

                                if (projectAndDiagnostics.Diagnostics.Any())
                                {
                                    projectsAndDiagnostics[projectAndDiagnostics.Project] = projectAndDiagnostics.Diagnostics;
                                }
                            }

                            return(projectsAndDiagnostics.ToImmutable());
                        }
                    }

                    return(ImmutableDictionary <Project, ImmutableArray <Diagnostic> > .Empty);
                }
            }
        public virtual async Task <ImmutableDictionary <Project, ImmutableArray <Diagnostic> > > GetProjectDiagnosticsToFixAsync(FixAllContext fixAllContext)
        {
            using (Logger.LogBlock(FunctionId.CodeFixes_FixAllOccurrencesComputation_Diagnostics, fixAllContext.CancellationToken))
            {
                var project = fixAllContext.Project;
                if (project != null)
                {
                    switch (fixAllContext.Scope)
                    {
                    case FixAllScope.Project:
                        var diagnostics = await fixAllContext.GetProjectDiagnosticsAsync(project).ConfigureAwait(false);

                        var kvp = SpecializedCollections.SingletonEnumerable(KeyValuePair.Create(project, diagnostics));
                        return(ImmutableDictionary.CreateRange(kvp));

                    case FixAllScope.Solution:
                        var projectsAndDiagnostics = new ConcurrentDictionary <Project, ImmutableArray <Diagnostic> >();
                        var options = new ParallelOptions()
                        {
                            CancellationToken = fixAllContext.CancellationToken
                        };
                        Parallel.ForEach(project.Solution.Projects, options, proj =>
                        {
                            fixAllContext.CancellationToken.ThrowIfCancellationRequested();
                            var projectDiagnostics = fixAllContext.GetProjectDiagnosticsAsync(proj).WaitAndGetResult(fixAllContext.CancellationToken);
                            if (projectDiagnostics.Any())
                            {
                                projectsAndDiagnostics.TryAdd(proj, projectDiagnostics);
                            }
                        });

                        return(projectsAndDiagnostics.ToImmutableDictionary());
                    }
                }

                return(ImmutableDictionary <Project, ImmutableArray <Diagnostic> > .Empty);
            }
        }
        public virtual async Task<ImmutableDictionary<Project, ImmutableArray<Diagnostic>>> GetProjectDiagnosticsToFixAsync(FixAllContext fixAllContext)
        {
            using (Logger.LogBlock(FunctionId.CodeFixes_FixAllOccurrencesComputation_Diagnostics, fixAllContext.CancellationToken))
            {
                var project = fixAllContext.Project;
                if (project != null)
                {
                    switch (fixAllContext.Scope)
                    {
                        case FixAllScope.Project:
                            var diagnostics = await fixAllContext.GetProjectDiagnosticsAsync(project).ConfigureAwait(false);
                            var kvp = SpecializedCollections.SingletonEnumerable(KeyValuePair.Create(project, diagnostics));
                            return ImmutableDictionary.CreateRange(kvp);

                        case FixAllScope.Solution:
                            var projectsAndDiagnostics = new ConcurrentDictionary<Project, ImmutableArray<Diagnostic>>();
                            var options = new ParallelOptions() { CancellationToken = fixAllContext.CancellationToken };
                            Parallel.ForEach(project.Solution.Projects, options, proj =>
                            {
                                fixAllContext.CancellationToken.ThrowIfCancellationRequested();
                                var projectDiagnostics = fixAllContext.GetProjectDiagnosticsAsync(proj).WaitAndGetResult(fixAllContext.CancellationToken);
                                if (projectDiagnostics.Any())
                                {
                                    projectsAndDiagnostics.TryAdd(proj, projectDiagnostics);
                                }
                            });

                            return projectsAndDiagnostics.ToImmutableDictionary();
                    }
                }

                return ImmutableDictionary<Project, ImmutableArray<Diagnostic>>.Empty;
            }
        }
            internal virtual async Task<ImmutableDictionary<Project, ImmutableArray<Diagnostic>>> GetProjectDiagnosticsToFixAsync(
                FixAllContext fixAllContext)
            {
                using (Logger.LogBlock(FunctionId.CodeFixes_FixAllOccurrencesComputation_Diagnostics, fixAllContext.CancellationToken))
                {
                    var project = fixAllContext.Project;
                    if (project != null)
                    {
                        switch (fixAllContext.Scope)
                        {
                            case FixAllScope.Project:
                                var diagnostics = await fixAllContext.GetProjectDiagnosticsAsync(project).ConfigureAwait(false);
                                var kvp = SpecializedCollections.SingletonEnumerable(KeyValuePair.Create(project, diagnostics));
                                return ImmutableDictionary.CreateRange(kvp);

                            case FixAllScope.Solution:
                                var projectsAndDiagnostics = ImmutableDictionary.CreateBuilder<Project, ImmutableArray<Diagnostic>>();

                                var tasks = project.Solution.Projects.Select(async p => new
                                {
                                    Project = p,
                                    Diagnostics = await fixAllContext.GetProjectDiagnosticsAsync(p).ConfigureAwait(false)
                                }).ToArray();

                                await Task.WhenAll(tasks).ConfigureAwait(false);

                                foreach (var task in tasks)
                                {
                                    var projectAndDiagnostics = await task.ConfigureAwait(false);
                                    if (projectAndDiagnostics.Diagnostics.Any())
                                    {
                                        projectsAndDiagnostics[projectAndDiagnostics.Project] = projectAndDiagnostics.Diagnostics;
                                    }
                                }

                                return projectsAndDiagnostics.ToImmutable();
                        }
                    }

                    return ImmutableDictionary<Project, ImmutableArray<Diagnostic>>.Empty;
                }
            }