declare a delegate c#

delegates in c#

//start with Delegate

using System;
using System.IO;

class Delegate
{
  //create delegate using delegate keyword
  public delegate void HelloMethod(string str);
  //Remove delegate Keyword it will be normal method declaration
  
  public static void Main(String [] args)
  {
    //function poiting to delegate instance
     HelloMethod delegateInstance = new HelloMethod(print);
    //calling delegate which invokes function print()
    delegateInstance("Hey there! Iam delegate method");
  }
  
  public static void print(string delegateStr)
  {
    Console.WriteLine(delegateStr);
  }
}
//Information on delegate

//Delegate is a type safe function pointer which means can point a function to 
//the delegate when delegate get invokes function automatically invokes since 
//function is pointed to the delegate

Posted by: Guest on May-16-2021

// Create the Delgate method. public delegate void Del(string message); // Create a method for a delgate. public static void DelegateMethod(string message) { Console.WriteLine(message); } // Instatiate the delegate. Del hadler = DelegateMethod; // Call the delegate. hadler("Hello World"); // Output // Hello World

// Declare a delegate type public delegate double MyDelegateType(double x); // Define some consummer that uses functions of the delegate type public double Consummer(double x, MyDelegateType f){ return f(x); } //... // Define a function meant to be passed to the consummer // The only requirement is that it matches the signature of the delegate public double MyFunctionMethod(double x){ // Can add more complicated logic here return x; } // In practice now public void Client(){ double result = Consummer(1.234, x => x * 456.1234); double secondResult = Consummer(2.345, MyFunctionMethod); }

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