Check out example codes for "C# linq include". It will help you in understanding the concepts better.

Code Example 1

//If you have a Customer model that contains a list of orders.
//You can include the orders like this
var customersWithOrders = _dbContext.Customers
	.Include(c => c.Orders)
  	.ToList();

//Lets say those orders then contain products. You can include those like so:
var customersWithOrdersAndProducts = _dbContext.Customers
	.Include(c => c.Orders)
  		.ThenInclude(o => o.Products)
  	.ToList();

Learn ReactJs, React Native from akashmittal.com