Turns UTF-8 hex representation of the character to its Unicode code in Little Endian

utf8-unicode.cs

var hex = "d8a7";
var utf8 = Enumerable.Range(0, hex.Length)
                     .Where(x => x % 2 == 0)
                     .Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
                     .ToArray();
					 
var s = Encoding.UTF8.GetString(utf8);
var uni = Encoding.Unicode.GetBytes(s);
Console.WriteLine("0x" + string.Join("", uni.Reverse().Select(x => x.ToString("X"))));