fCraft.Map.GetFallbackBlock C# (CSharp) Method

        public static Block GetFallbackBlock( Block block )
        {
            return FallbackBlocks[( int )block];
        }

 // For non-extended players, use appropriate substitution
 public void ProcessOutgoingSetBlock(ref Packet packet)
 {
     if (packet.Data[7] > (byte)Map.MaxLegalBlockType && !UsesCustomBlocks)
     {
         packet.Data[7] = (byte)Map.GetFallbackBlock((Block)packet.Data[7]);
     }
 }