implement win dialog using MVVM pattern

[AlexandrSHad]

DilogService from DCOM Engeneering: https://www.youtube.com/watch?v=OqKaV4d4PXg

https://www.codeproject.com/Articles/36745/Showing-Dialogs-When-Using-the-MVVM-Pattern#wpf_usage_showmessagebox

https://code.msdn.microsoft.com/windowsapps/Message-dialog-sample-00c928f5

http://losev-al.blogspot.ru/2013/02/messagebox-windows-store.html

https://social.msdn.microsoft.com/Forums/ru-RU/482f11df-9975-46c2-a9af-336901859eb1/wpf-mvvm-?forum=fordesktopru

http://www.cyberforum.ru/wpf-silverlight/thread1783649.html

https://www.codeproject.com/Articles/35553/XAML-Dialog-Control-Enabling-MVVM-and-Dialogs-in-W

https://www.codeproject.com/Articles/812542/MessageBox-using-MVVM-Patterns