What is the best way to pass data between test and test constructor?

Question

.NET

There are two applications:
1) Something like a test constructor that allows you to create a question, answers to it, and other information about the question. After creation, the question should be added to some general list.
2) Application - a test that loads all the questions created in the constructor (receives data from the list) and already works with them.
Question: what is the best way to exchange information in this case? Namely, how best to store the created questions, for their further loading into the application - a test.
Since the question is a bit, I thought to use separate files for each question and load information from them into the test, but this has a lot of resources and greatly affects the speed. How to do it better?

Answer 1

Namely, how best to store the created questions, for their further loading into the application - a test.

XML is. Push all the questions of one block into one file.