private void DropObjectType(string obj_type, bool isAsync, DropObjectTypeCallback callback, Object state)
        {
            var parameterList = new Dictionary<string, string> { { "method", "facebook.data.dropObjectType" } };
            Utilities.AddRequiredParameter(parameterList, "obj_type", obj_type);

            if (isAsync)
            {
                SendRequestAsync<data_dropObjectType_response, bool>(parameterList, new FacebookCallCompleted<bool>(callback), state);
                return;
            }

            SendRequest(parameterList);
        }
 /// <summary>
 /// Remove a previously defined object type. This will also delete ALL objects of this type. This deletion is NOT reversible. 
 /// </summary>
 /// <example>
 /// <code>
 /// 
 /// </code>
 /// </example>
 /// <param name="obj_type">Name of the object type to delete. This will also delete all objects that were created with the type. </param>
 /// <param name="callback">The AsyncCallback delegate</param>
 /// <param name="state">An object containing state information for this asynchronous request</param>        
 public void DropObjectTypeAsync(string obj_type, DropObjectTypeCallback callback, Object state)
 {
     DropObjectType(obj_type, true, callback, state);
 }