ref

var files = Directory.GetFiles(folder, "*.dll").Where(x=>Path.GetFileName(x).StartsWith("EDD")).ToList();

            foreach (string file in files)
            {
                try
                {

                    var assembly = Assembly.LoadFrom(file);
                    var types = assembly.GetTypes();

                    foreach (Type type in types)
                    {
                        var methods = type.GetMethods();
                        foreach (MethodInfo method in methods)
                        {
                            if (method.GetParameters().Any(x => x.IsOptional))
                            {
                                Console.WriteLine($"{file}|{type.Name}|{method.Name}");
                            }
                        }
                    }

                }
                catch (ReflectionTypeLoadException ex)
                {
                    StringBuilder sb = new StringBuilder();
                    foreach (Exception exSub in ex.LoaderExceptions)
                    {
                        sb.AppendLine(exSub.Message);
                        FileNotFoundException exFileNotFound = exSub as FileNotFoundException;
                        if (exFileNotFound != null)
                        {
                            if (!string.IsNullOrEmpty(exFileNotFound.FusionLog))
                            {
                                sb.AppendLine("Fusion Log:");
                                sb.AppendLine(exFileNotFound.FusionLog);
                            }
                        }
                        sb.AppendLine();
                    }
                    string errorMessage = sb.ToString();
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"ERROR {Path.GetFileName(file)}");
                }