public static void Main()
for (int i = 0; i < arr.Length; i++)
Console.Write($"{arr[i]:D2}");
for (int i = 0; i < arr.Length; i++)
for (int i = 0; i < arr.Length; i++)
Console.Write($"0x{arr[i]:X2}");
for (int i = 0; i < arr.Length; i++)
Console.Write($"0x{arr[i]:X1}");