Using verbatim strings for SQL queries can make your code much more readable. For example, which one of the following queries is easier to read?

This one?

string query = @"
    SELECT 
        User.FirstName, 
        User.LastName, 
        User.Age,
        User.Gender, 
        User.HairColor, 
        Adress.Street, 
        Adresse.Zip,
        Adress.City, 
        Adress.Country 
    FROM 
        User 
    INNER JOIN 
        Adress ON User.AdressId = Adress.Id 
    SORT BY 
        User.FirstName, 
        User.LastName
    ";

or this one?

string query = "SELECT User.FirstName, User.LastName, User.Age, "
    + "User.Gender, User.HairColor, Adress.Street, Adresse.Zip, "
    + "Adress.City, Adress.Country FROM User INNER JOIN Adress ON "
    + "User.AdressId = Adress.Id SORT BY User.FirstName, "
    + "User.LastName";

The SQL engine doesn’t care for the whitespace you introduce in queries with verbatim strings. So do your fellow programmers a favor and use them for your SQL queries!