Calling internal constructor of a class through Reflection

Type contentType = typeof(SPContentType);
Type paramType = typeof(SPContentTypeId);
Type[] paramArray = { paramType };
ConstructorInfo consInfo = contentType.GetConstructor(BindingFlags.Instance BindingFlags.NonPublic, null, CallingConventions.Any, paramArray, null);
object[] paramsX = { new SPContentTypeId(contentTypeID) };
SPContentType contentTypeObject = consInfo.Invoke(paramsX) as SPContentType; contentTypeObject.GetType().InvokeMember("Web", BindingFlags.NonPublic BindingFlags.Instance BindingFlags.SetProperty BindingFlags.IgnoreCase, null, contentTypeObject, new object[] { targetWeb }); contentTypeObject.GetType().InvokeMember("Collection", BindingFlags.NonPublic BindingFlags.Instance BindingFlags.SetProperty BindingFlags.IgnoreCase, null, contentTypeObject, new object[] { targetWeb.ContentTypes }); return contentTypeObject;