C#

1. Adding referencesUsing System.security.cryptography;using System.IO;2. Add default key vectorDefault key vector private static byte[] Keys = {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};3. Adding a cryptographic decryption class /// des

Dynamic string StringBuilderThe System.Text.StringBuilder class can implement dynamic strings compared to the string class. In addition, the dynamic meaning is that when the string is modified, the system does not need to create a new object, does

Types of floating-point numbers for numeric types: In our daily life there are not only integers, but also decimals, in C # There are 2 data types to represent (single-precision) float, (double-precision) double. Their difference is that the value

When calling the parent class method, how to be thread safe with the subclass method, which is not the same instance of the lock object, see the following three scenarios. CASE1: The following code, when calling the method of the parent class, and

Objective The recent use of a C + + project requires scripting, which is related to how to bind an object to the script runtime environment. Due to the use of multiple scripting languages, the existing binding technology does not meet the

C # interface (Interface) The interface defines the syntax contracts that should be followed when all classes inherit an interface. The interface defines the "what" part of the syntax contract, and the derived class defines the "How to" section of

C # unsafe code C # allows pointer variables to be used in a function when a block of code uses the unsafe modifier tag. Unsafe or unmanaged code refers to a block of code that uses a pointer variable. Pointer variable A pointer is a variable that

In general, we have four ways to implement serial communication in C #: First: Through the MSComm control this is the simplest and most convenient method. It is difficult to control the function, and the control is not the system itself, so it has

When making the ordering system mobile phone side, encountered a problem, to implement the login function, I want to invoke the background method to verify and judge. We use WebForm to develop, under normal circumstances, as long as the method of

First, get does not support lazy,load support lazy. Second, use get to load the data, if there is no matching data, return null, and load throws an exception. Third, the execution of load (), the first to find out whether the current object exists,

1 About the introduction (1) Owning namespace: System.Collections.Generic public class list: Ilist, Icollection, Ienumerable, IList, ICollection, IEnumerable. (2) The List class is a generic equivalent class of the ArrayList class. This class

Summary on Calling C # HG_Interface.dll of Guangzhou Medical Insurance (external component exception ), At the beginning, I also encountered a strange situation. The dll provided by chuangzhi can only be in the UIWinform and WPFUsed on,WebForm, WPF,

C # I = 0; I = I ++, what is the value of I ?, Yesterday I watched the dalao chat in the group. Someone asked this question. This question should be quite common  Int I = 0, t; For (t = 0; t { I = I ++; Console. WriteLine (I ); } Daxie said that for

Log4net, c # log4net The previous article was copied from others, mainly about rules and instructions. This article focuses on actual use. First, we will introduce the most common configuration file methods in the project. 1. log4net. config file

XUnit Entry 1: xUnit entry After reading the introduction Demo of nhib.pdf, I feel that testing-driven development will be more efficient. Of course, do you think you need additional programming unit testing code? How can development be more

C # automatically create database tables based on the object class by using custom features, New users of. Net usually tend to confuse attributes with attributes. In fact, they are two different things. Attribute refers to the data fields

C # this usage series (2) use the this modifier to extend the method for the original type, Define a static class. The class defines static methods. Add the this modifier before the method parameter type to extend the class behind this

GJM: use C # To implement web crawler (1) [reprint],     Web Crawlers play a major role in information retrieval and processing and are an important tool for collecting network information. Next we will introduce the simple implementation of

Basic. net knowledge and basic. net development knowledge Winform: desktop applications Internet application: ASP. NET Website Mobile development: wp7 C/S: Client/Server mode B/S: Browser/Server mode   Console. WriteLine ("input language"); //

Shi linfeng: open-source HtmlAgilityPack public small library package, Developed programs may have been used for information collection, and Shi linfeng often does some data collection or automated operation software for some websites. It is easy to