Schedulle a task for some days of the week

[C# Programming]

My need is to schedulle to run a C# application once a day for some days of the week
And I provide an UI to set those days

So I was trying to find out if the best way is to make a service to do that or to programaticaly try to make a new Windows task to run the app as an exe

Thanks for your help / suggestion

Olivier