how to create linux Desktop App using C# with Visual Studio

Well ... actually Angular 7 + Dot NetCore 2 can be selfhosted - (even run as a service) which makes it pretty much standalone :)

There is no need for a Webserver or anything.

@

may its a (Angular 7 + Dot NetCore 2) webApp right ??

but we want to standalone application

HI,

you might try this one: https://github.com/picoe/Eto

But actually I suggest you rather do something that is completely plattform independent, like Angular 7 + Dot NetCore 2.