"C # Review Summary" to elaborate anonymous methods

1Preface

This series summarizes the basics such as delegate, anonymous method, lambda expression, generic delegate, Expression tree, event. (I have a small white one, there is the wrong place to hope that the big guy correct)

Department Class 1: Commissioned

Department 2: An anonymous approach

Series 3: About lambda expressions

Series 4: Generic Delegates

Series 5: Elaborate expression tree

Series 6: Events in detail

Then the delegation of the previous article to discuss the anonymous method, still with the big guy's article to start:

"In the previous article has been known, complete a commissioned application in three steps to go, lack of a step is not, if you want to stride, beware of the pace of the big pull the egg." But Microsoft is not afraid to pull the egg, must take three steps to make two steps to go! So Microsoft is using an anonymous method to simplify the top three steps. Anonymous method How to say this thing, in C # is absolutely dispensable things, just for C # icing on the cake , some ingenuity to give it a name called Grammar sugar. "

2What is an anonymous method

the anonymous method is c#2.0 introduces a new feature that allows developers to declare their own function code inline (inline) without using a delegate function (delegate. Anonymous methods are usually in the 1. A temporary method is required and the method is rarely used; 2. The code for this method is very short and may even be used in cases where the method declaration is short.

3initial knowledge of anonymous methods

As we have already mentioned, a delegate is used to refer to a method that has the same label as it. In other words, you can use a delegate object to invoke a method that can be referenced by a delegate.

Anonymous Methods ( Anonymous methods) provides a technique for passing code blocks as a delegate parameter. An anonymous method is a method that has no name but a principal.

in an anonymous method, you do not need to specify a return type, which is inferred from the return statement within the method body .

4use of anonymous methods

It takes only two steps to complete:

STEP01: First define a delegate with delegate.

STEP02: Use this notation delegate (int x, int y) {return x + y;} , assigning a method to a delegate is, in fact, an anonymous method.

    classProgram {//STEP01: First define a delegate with delegate.          Public Delegate intCaculateadd (intXinty); Static voidMain (string[] args) {            //STEP02: Use this notation delegate (int x, int y) {return x + y;}, assign a method to the delegateCaculateadd ADD1 =Delegate(intXintY) {returnX +y;}; //int result = Cadd.invoke (5, 6);            intresult = ADD1 (4,5);            Console.WriteLine (result);                   Console.readkey (); }    }

It is surprising to find that this is not the three steps in front of the two steps to go wow?

5Summary

an anonymous method implements a delegate in only two steps, eliminating the step of declaring the method, which is convenient for programmers. This way, the anonymous method is almost there, and the next article is about Lambda expressions.

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"C # Review Summary" to elaborate anonymous methods