int[] first = { 1 };
int[] second = { 1, 2, 3, 4 };
int[] third = { 1, 1, 0, 3, 5 };

Console.WriteLine(first is [1, 2]); // false, length
Console.WriteLine(second is [1, .., 4]); //true
Console.WriteLine(third is [_, >1, ..]); //false, 1 is not > 1