A low level block struct.

Block.cs

public struct Block
{
    uint data; //8 bytes

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public Block(BlockType id, ushort metaData, bool isOpaque)
    {
        data = (uint)((ushort)id << 16) | (uint)(metaData << 1) | (uint)(isOpaque ? 0x1 : 0x0);
    }

    //Id 0-65535
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public BlockType GetID()
    {
        return (BlockType)((ushort)(data >> 16));
    }

    //Meta 0-32766
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public ushort GetMetaData()
    {
        return (ushort)((data & 0x0000FFFF) >> 1);
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public bool GetIsOpaque()
    {
        return data % 2 == 1;
    }
}