MinecraftLibrary for C#
using otya.Minecraft.Material;
using otya.Minecraft.World;
using otya.Minecraft;
using System.IO;
namespace Test
{
class Program
{
static void Main(string[] args)
{
using (var world = new World(Minecraft.GetSaveFolder(args[0])))
{
world.SetBlock(0, 0, 0, Material.Stone);
}
}
}
}