public void SaveEndpointsFile()
        {
            if (!Directory.Exists(settingsVM.ProjectsFolder))
            {
                Directory.CreateDirectory(settingsVM.ProjectsFolder);
            }

            try
            {
                DataContractSerializer ser = new DataContractSerializer(typeof(List <SpeechEndpointConfig>));
                var xmlSettings            = new XmlWriterSettings {
                    Indent = true, IndentChars = "\t"
                };
                using (var writer = XmlWriter.Create(settingsVM.VoiceEndpointsFile, xmlSettings))
                {
                    ser.WriteObject(writer, VoiceEndpoints.ToList());
                }
            }
            catch (Exception exc)
            {
                var msg = $"Error serialising or saving the projects file: {exc}";
                MessageBox.Show(msg);
            }
        }