private static string ModifyMessage(DialogImageTypeEnum imageType)
        {
            switch (imageType)
            {
            case DialogImageTypeEnum.Error:
                return("Error");

            case DialogImageTypeEnum.Info:
                return("Info");

            case DialogImageTypeEnum.Warning:
                return("Warning");

            default:
                return("Error");
            }
        }
        public DialogMessageViewModel(DialogImageTypeEnum imageType, string message) : base(ModifyMessage(imageType))
        {
            this.Message   = message;
            this.okCommand = new DelegateCommand(OnOKClicked);
            switch (imageType)
            {
            case DialogImageTypeEnum.Error:
                ImageSource = "/Policardiograph_App;component/Images/Error.png";
                break;

            case DialogImageTypeEnum.Info:
                ImageSource = "/Policardiograph_App;component/Images/Info.png";
                break;

            case DialogImageTypeEnum.Warning:
                ImageSource = "/Policardiograph_App;component/Images/Warning.png";
                break;
            }
        }