Transposition Multiplication Method

void Main()
{
    //initialize
    int tries = 100_000_000;
    Random rnd = new Random();
    var fieldArrays = Enumerable.Range(1, tries).Select(i => LongRandom(rnd)).ToArray();

    Console.WriteLine("Starting test 1...");
    var start = DateTime.Now;
    for (int x = 0; x < tries; x++)
    {
        ///////////////////////////
        ///     Test 1
        //////////////////////////
        var fld = Transpose2(fieldArrays[x]);
        /////////////////////////
    }
    var end = DateTime.Now;
    var duration = end - start;
    Console.WriteLine(duration.ToString());

    Console.WriteLine("Starting test 2...");
    start = DateTime.Now;
    for (int x = 0; x < tries; x++)
    {
        ///////////////////////////
        ///     Test 2
        //////////////////////////
        var fld = Transpose(fieldArrays[x]);
        /////////////////////////
    }
    end = DateTime.Now;
    duration = end - start;
    Console.WriteLine(duration.ToString());
}

// Define other methods and classes here
public static ulong Transpose2(ulong state)
{
    ulong r0 = state & 0xF0000F0000F0000FL; //unchanged diagonals

    ulong t = (state & 0x0000F000FF000FF0UL) * ((1UL << 12) + (1UL << 24));
    ulong r1 = (state & 0x0F0000F0000F0000L) >> 12;
    r0 |= (state & 0x00F0000F00000000L) >> 24;
    r1 |= (state & 0x000F000000000000L) >> 36;
    r0 |= (state & 0x000000000000F000L) << 36;
    r1 |= t & 0x0FF000FF000F0000UL;

    return r0 | r1;
}

public static ulong Transpose(ulong state)
{
    return state & 0xF0000F0000F0000FL //unchanged diagonals
        | (state & 0x0F0000F0000F0000L) >> 12
        | (state & 0x0000F0000F0000F0L) << 12
        | (state & 0x00F0000F00000000L) >> 24
        | (state & 0x00000000F0000F00L) << 24
        | (state & 0x000F000000000000L) >> 36
        | (state & 0x000000000000F000L) << 36;
}

public static ulong LongRandom(Random rand)
{
    byte[] buf = new byte[8];
    rand.NextBytes(buf);
    return BitConverter.ToUInt64(buf, 0);
}