I am currently using this technique:
...
string s = user.Gender ? "Mr." : "Mrs.";
string body = $@"Dear {s} {user.First_name}..."
...
I want to do something like:
...
string body = $"Dear {return user.Gender ? "Mr." : "Mrs."} {user.First_name}..."
...
You need to put parenthesis around the expression like so:
string body = $"Dear {(user.Gender ? "Mr." : "Mrs.")} {user.First_name}...";
The reason for that is the colon which signals a format string for something.
You can easily do so with a pair of paranteces around your conditional expression, but a better solution would be to make the greeting reusable by defining a property on the class:
public class User {
public string FirstName { get; set; }
public string LastName { get; set; }
public bool Gender { get; set; }
public string Title { get => Gender ? "Mr." : "Mrs."; }
public string Greeting { get => $"{Title} {FirstName} {LastName}"; }
}
void run()
{
var user = new User { Gender = true, FirstName = "John", LastName = "Smith" };
string simpleSolution = $"Dear {(user.Gender ? "Mr." : "Mrs.")} {user.FirstName} {user.LastName}, hello and welcome.";
string betterSolution = $"Dear {user.Greeting}, hello and welcome.";
}
$"Dear {(user.Gender ? "Mr." : "Mrs.")}"