protected override void LoadContent()
 {
     _AvodadoTemplate      = SharpGLTF.Runtime.MonoGameModelTemplate.LoadDeviceModel(this.GraphicsDevice, "Models\\Avocado.glb");
     _BrainStemTemplate    = SharpGLTF.Runtime.MonoGameModelTemplate.LoadDeviceModel(this.GraphicsDevice, "Models\\BrainStem.glb");
     _CesiumManTemplate    = SharpGLTF.Runtime.MonoGameModelTemplate.LoadDeviceModel(this.GraphicsDevice, "Models\\CesiumMan.glb");
     _HauntedHouseTemplate = SharpGLTF.Runtime.MonoGameModelTemplate.LoadDeviceModel(this.GraphicsDevice, "Models\\haunted_house.glb");
 }
        protected override void UnloadContent()
        {
            _AvodadoTemplate?.Dispose();
            _AvodadoTemplate = null;

            _BrainStemTemplate?.Dispose();
            _BrainStemTemplate = null;

            _CesiumManTemplate?.Dispose();
            _CesiumManTemplate = null;

            _HauntedHouseTemplate?.Dispose();
            _HauntedHouseTemplate = null;
        }