static void Main(string[] args)
{
//A delegate is a type safe function pointer.
MyDelegate myDelegate = new MyDelegate(MyFunc);
myDelegate("Hello from the MyFunc method Lohith....");
List <Employee> empList = new List <Employee>();
empList.Add(new Employee()
{
ID = 1, Name = "Mary", Salary = 5000, Experience = 5
});
empList.Add(new Employee()
{
ID = 2, Name = "John", Salary = 9000, Experience = 8
});
empList.Add(new Employee()
{
ID = 3, Name = "Rachel", Salary = 3500, Experience = 2
});
empList.Add(new Employee()
{
ID = 4, Name = "Mariesa", Salary = 7000, Experience = 7
});
empList.Add(new Employee()
{
ID = 5, Name = "Burt", Salary = 4200, Experience = 3
});
empList.Add(new Employee()
{
ID = 6, Name = "George", Salary = 6000, Experience = 6
});
IsPromotable isPromotable = new IsPromotable(Promote);
Console.WriteLine("********Promoting by Experience*********");
//Passing delegate function as a parameter
Employee.PromoteEmployee(empList, isPromotable);
Console.WriteLine("********Promoting by Salary*********");
//Passing delegate function as a lambda function
Employee.PromoteEmployee(empList, emp => emp.Salary > 4500);
Console.WriteLine("***********Multi-cast delegates*********");
//Multi-cast delegates: A delegate that points to more than 1 delegate.
SampleDelegate del1, del2, del3, del4;
del1 = new SampleDelegate(SampleOne);
del2 = new SampleDelegate(SampleTwo);
del3 = new SampleDelegate(SampleThree);
del4 = del1 + del2 + del3 - del2;//delegate 4 is pointing to all 3 methods
del4.Invoke();
Console.WriteLine("***Multi-cast delegates other way****");
SampleDelegate sd = new SampleDelegate(SampleOne);
sd += SampleTwo;
sd += SampleThree;
sd -= SampleOne;
sd();
Console.WriteLine("*****Sample int return delegate******");
SampleReturnDelegate srd = new SampleReturnDelegate(SampleReturnOne);
srd += SampleReturnTwo;//Returns the last value.
int retVal = srd();
Console.WriteLine("Returned value from SampleReturn: " + retVal);
Console.ReadKey();
}
