public void LoadObject(string objectName)
        {
            if (_objectsHandleDictionary.ContainsKey(objectName))
            {
                return;
            }
            int objHandle;

            GL.GenVertexArrays(1, out objHandle);
            _objectsHandleDictionary.Add(objectName, new RenderObject()
            {
                ObjectHandle = objHandle
            });
            GL.BindVertexArray(_objectsHandleDictionary[objectName].ObjectHandle);
        }