c# - Operator || cannot be applied to type bool and string / string and string

Question

Simple task that I am finding really difficult.

 Console.Write("[" + CurrentTime + "] Name a day of the week? ");
 string vDay = Console.ReadLine();
 if (vDay != "Monday" || "Tuesday" || "Wednesday" || "Thursday" || "Friday")
 {
  Console.WriteLine("that is not a valid day of the week");
 }

Firsty when I use != it gives me an error saying "cannot be applied to bool and string" without the != and just the = I get "string and string"

Basically what I am trying to do is if someone types "hello" for example it will say that is not a valid day of the week.

Such a simple task but im finding it so difficult, thanks for any help.

Answer 1

Might be cleaner to have something like:

List<string> list = new List<string> { "Monday", "Tuesday", "Wednesday", "Thursday", ... };

if (!list.Contains(vDay ))
{
    Console.WriteLine("that is not a valid day of the week");
}