using System;

//https://stackoverflow.com/questions/4188013/how-to-implement-icomparable-interface/71053462#71053462

internal class Program

{

    public static void Main()

    {

        BankAccount[] accounts = new BankAccount[]{new BankAccount()

        {Name = "Jack", Balance = 150.08M}, new BankAccount()

        {Name = "James", Balance = 70.45M}, new BankAccount()

        {Name = "Mary", Balance = 200.01M}, new BankAccount()

        {Name = "John", Balance = 200.01M}};

        Array.Sort(accounts);

        Array.ForEach(accounts, x => Console.WriteLine($"{x.Name} {x.Balance}"));

    }

}

​

public class BankAccount : IComparable<BankAccount>

{

    public string Name { get; set; }

​

    public decimal Balance { get; set; }

​

    public int CompareTo(BankAccount other) => 

    (Balance, Name).CompareTo((other.Balance, other.Name));

}