Extension method to convert NSData into string representation

Extensions.cs

//Use this extension method to get the hex string from NSData, I use this to get the push notification token in iOS >= 13
public static string HexadecimalStringFromData(this NSData data)
{
    nuint dataLength = data.Length;
    if (dataLength == 0)
    {
        return null;
    }

    return string.Join(string.Empty, data.Select(b => b.ToString("X2")).ToList());
}