// not required when using lambda expression
public static bool Promote(Employee2 emp)
{
if (emp.Experience >= 5)
{
return(true);
}
else
{
return(false);
}
}
public Delegates()// class constructor
{
// create an instance of delegate, to point delegate to specific function with same return type and same parameters
// pass the method name as parameter
HelloFunctionDelegate del = new HelloFunctionDelegate(Hello);
// calling delegate:
del("Hello from delegate");
List <Employee2> empList = new List <Employee2>();
empList.Add(new Employee2()
{
ID = 101, Name = "Mary", Salary = 5000, Experience = 5
});
empList.Add(new Employee2()
{
ID = 102, Name = "Mike", Salary = 4000, Experience = 4
});
empList.Add(new Employee2()
{
ID = 103, Name = "John", Salary = 6000, Experience = 6
});
empList.Add(new Employee2()
{
ID = 104, Name = "Todd", Salary = 3000, Experience = 3
});
// on "new IsPromotable" pass a function of type boolean that takes a Emplyee2 as parameter
// not required when using lambda expression
IsPromotable isPromotable = new IsPromotable(Promote);
Employee2.PromoteEmployee(empList, isPromotable);
// using lambda expression (compiler creates a delegate, a function then passes it to current method)
Employee2.PromoteEmployee(empList, emp => emp.Experience >= 5);
}