Question

I have home object : id , FirstName, Lastname, Fees[ ]

Fees is object contain Amount description

home object include the Fees array

I have list of homes and every home has array/list from fees

I need to sort the homes depend on the total of Amount in fees

List <home> h = new List <home>();

Answer 1

Assuming you have an object structure like this:

class Home
{
    public string Name { get; set; }
    public Fee[] Fees { get; set; }
}

class Fee
{
    public int Amount { get; set; }
}

You can sort it using the following statement:

var orderedHomes = homes.OrderBy(x => x.Fees.Sum(y => y.Amount));