protected void SetFace(byte skinColor = 0, short eyeType = 0, byte eyeColor = 0, byte mouthType = 0) { if (this.NPC == null) throw new InvalidOperationException("NPC's race has to be set first."); this.NPC.SkinColor = skinColor; this.NPC.EyeType = eyeType; this.NPC.EyeColor = eyeColor; this.NPC.MouthType = mouthType; }