C # Delegate (function parameter transfer)

When I was learning to delegate this item, I didn't quite understand the function parameter. So I made a deep understanding of an example and shared it with you.

First, let's talk about my understanding of delegation. Delegation is a variable that can execute multiple similar functions. The reason why it is a variable that executes similar functions is that it can only accept one function, A function can only execute one type of function. Its function is to improve the flexibility and scalability of the program. For example, if we do not need to delegate, a function can only execute addition operations, however, if a delegate is used, it can execute addition, subtraction, multiplication, division at the same time. That is to say, the function of this program is extended, and the flexibility of work is also improved.

The following code is used to calculate the power and multiplication simultaneously:

Namespace ConsoleApplication16 {// create a delegate double DoubleOp (double x); class Program {static void Main (string [] args) {// instantiate two calculation methods: DoubleOp [] operations = {new DoubleOp (MathOperations. multiByTwo), new DoubleOp (MathOperations. square)}; for (int I = 0; I
 
  
The result after this code is run is as follows:
  

  
I read the source code once. If I don't quite understand it, I just knocked it out and let it run. Seeing the running result, I felt that the code was clear, mainly because I didn't clarify its logic, sometimes you can't just do it. If you do it first, you may understand it.