C#委托2

class Program
    {
        static void Main(string[] args)
        {
            Employee[] employees =
            {
                new Employee("Bugs Bunny",20000),
                new Employee("Elmer Fudd",10000),
                new Employee("Daffy Duck",25000),
                new Employee("Wile Coyote",1000000.38m),
                new Employee("Foghorn Leghorn",23000),
                new Employee("RoadRunner",50000)
            };

            BubbleSorter.Sort<Employee>(employees,Employee.CompareSalary);
            foreach (var employee in employees)
            {
                Console.WriteLine(employee);
                Console.WriteLine();
            }
            Console.ReadKey();
        }
    }
    public class BubbleSorter
    {
        static public void Sort<T>(IList<T> sortArray, Func<T, T, bool> comparison)
        {
            bool swapped = true;
            do
            {
                swapped = false;
                for (int i = 0; i < sortArray.Count-1; i++)
                {
                    if (comparison(sortArray[i + 1], sortArray[i]))
                    {
                        T temp = sortArray[i];
                        sortArray[i] = sortArray[i + 1];
                        sortArray[i + 1] = temp;
                        swapped = true;
                    }
                }
            } while (swapped);
        }
    }
    public class Employee
    {
        public Employee(string name, decimal salary)
        {
            this.Name = name;
            this.Salary = salary;
        }

        public string Name { get; private set; }
        public decimal Salary { get; private set; }

        public override string ToString()
        {
            return string.Format("{0},{1:C}",Name,Salary);
        }
        public static bool CompareSalary(Employee e1, Employee e2)
        {
            return e1.Salary < e2.Salary;
        }
    }

Func<T, T, bool> 是一个委托类型，最后一个类型表示返回的类型。
BubbleSorter.Sort<Employee>(employees,Employee.CompareSalary);这样写没有问题。
BubbleSorter.Sort(employees,Employee.CompareSalary);这样写也没有问题，编译器可以自动推断类型。