static void Main(string[] args)
{
// Example 1a
// pointer to a function
MethodPtr ptrObj = TestMethod;
ptrObj.Invoke();
// Example 1b
// call back
CallBackExample f1 = new CallBackExample();
f1.wheretocall = CallHere; // Step 1
f1.Search();
// Example 1c
// Multicast Delegate
messages = new List <string>();
MultiCastExample f2 = new MultiCastExample();
f2.wheretocall += CallHereForConsole;
f2.wheretocall += CallHereToWriteInternally;
f2.wheretocall += CallHereToWriteToFile;
f2.Search();
// Example 1d
// invoking from the outside
MultiCastExample f3 = new MultiCastExample();
f3.wheretocall += CallHereForConsole;
f3.wheretocall.Invoke("Subscriber is sending the message!!!"); // The client can invoke.
f3.wheretocall = null; // The delegate can be modified.
f3.wheretocall += CallHereToWriteInternally;
f3.Search();
// Example 1e
// Using Event, Encapsulating the delegate
EventEncaplsulationExample f4 = new EventEncaplsulationExample();
f4.wheretocall += CallHereForConsole;
// following 2 lines will Error
// f4.wheretocall.Invoke("Subscriber is sending the message!!!");
// f4.wheretocall = null; // The delegate can be modified.
// The Error is:
// "The event 'DelegateExamples.EventEncaplsulationExample.wheretocall' can only appear
// on the left hand side of += or -= (except when used from within the type 'DelegateExamples.EventEncaplsulationExample')
// I:\SandBox\GeekQuiz\ConsoleApplication2\ConsoleApplication2\Program.cs 47 16 ConsoleApplication2"
f4.wheretocall += CallHereToWriteInternally;
f4.Search();
}
public static void Main()
{
//To invoke a method from another class
MyClass mc = new MyClass();
mc.LongRunning();
//now there are 2 parties involved, class Program and class Myclass
SomeMethod();
MethodPtr del = new MethodPtr(SomeMethod);
del();
}