public delegate void Action<in T1, in T2>(T1 arg1, T2 arg2);
public delegate TResult Func<in T1, in T2, out TResult>(T1 arg1, T2 arg2);

Func<(string firstName, string lastName), string> f = (data) => data.firstName + data.lastName;
f(("Foo", "Bar"));

foreach (var claim in User.Claims)
{
   Debug.WriteLine($"Claim type: {claim.Type} - Claim value: {claim.Value}");
}

[Index(nameof(Url))]
public class Blog
{
    public int BlogId { get; set; }
    public string Url { get; set; }
}

[Index(nameof(Url), Name = "Index_Url")]

[Index(nameof(FirstName), nameof(LastName))]
public class Person
{
    public int PersonId { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

[Index(nameof(Url), IsUnique = true)]
public class Blog
{
    public int BlogId { get; set; }
    public string Url { get; set; }
}