BuildingTools/BlockMod/BlockSelections.cs

using System.Linq;
using GamecraftModdingAPI;
using GamecraftModdingAPI.Blocks;
using GamecraftModdingAPI.Utility;

namespace BlockMod
{
    public class BlockSelections
    {
        internal Block[] blocks = new Block[0];
        internal Block refBlock;

        public bool CheckNoBlocks(Block[] blocks)
        {
            if (blocks.Length == 0)
            {
                Logging.CommandLogWarning("No blocks selected. Use selectBlocks first.");
                return true;
            }

            return false;
        }

        public Block[] SelectBlocks(byte id)
        {
            var blocks = ObjectIdentifier.GetBySimID(id).SelectMany(block => block.GetConnectedCubes()).ToArray();
            return blocks;
        }

        public Block[] SelectBlocks(char id)
        {
            var blocks = ObjectIdentifier.GetByID(id).SelectMany(oid => oid.GetConnectedCubes())
                .ToArray();
            return blocks;
        }
    }
}