In-depth analysis of Hashtable, Dictionary, SortedDictionary, SortedList

Let's look at it first.Hashtable. MSDN: a set of key/value pairs. These key/value pairs are organized according to the hash code of the key. The Hash algorithm converts any-length input (also called pre- ing and pre-image) into fixed-length output

C # DDOS attack code snippet (pseudo IP)

1 // set "allow unsafe code" to true in Project Properties23 using System;4 using System. Net;5 using System. Net. Sockets;6 using System. Threading;7 // do not explain the required namespace8 namespace syn9 {10 public struct ipHeader11 {12131415

Weak references in C #

Code Description:  Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Class Program { Static void Main (string [] args) { DoWork (); Console. WriteLine (P. Target = null ); GC. Collect (); Console.

Hide the blinking cursor in TextBox

Problem: C #, how to hide the blinking cursor in TextBox? Solution: Call Windows API 1> set TabStop of TextBox to false; 2> Add the following code to the program VcD4NCjxwPiZuYnNwOzwvcD4NCjxkaXYgY2xhc3M9 "cnblogs_code"> Code highlighting

C # automatic setting and assignment of SQL Parameters

Introduction: on a certain day of a year, the company's Web programs were injected, resulting in a database mess. CIOs are furious and require that all database interactions be performed in the future only using SP. Therefore, even a query statement

How to install DLL files in GAC

How to install DLL files in Global Assembly Cache (GAC) using Visual Studio. create a small class library project, generate a strong name, and install the project in GAC. dll file, perform the following steps: in Visual Studio. create a New Visual C

C # extern modifier Overview

This section describes how to use the C # extern modifier and DllImport together with the static modifier. It can also be used for calling components of different versions of the same assembly and cannot be used together with the abstract modifier.

C # print data in the dataGridView

// Execute the data operation in the print form Private void toolStripButton2_Click (object sender, EventArgs e){ PrintDialog1.ShowDialog (); // sets the Print DocumentPrintPreviewDialog1.Document = this.

C # dynamic compilation and reflection execution

# Static methods in region Assembly 1 with no parameters and static classes Static void CodeAssembly_1 (){// Provide access to instances of the C # code generator and code compiler.CSharpCodeProvider provider = new CSharpCodeProvider (); //

C # Memory operations

Recently, I have nothing to worry about and found that all the friends around me are playing the "Plants vs. Zombies" game! So I thought about making this game tool! Although there are many similar tools on the internet, I can hardly find them

How to quickly release the memory of. NET programs

[DllImport ("kernel32.dll")]Public static extern bool SetProcessWorkingSetSize (IntPtr process, int minSize, int maxSize );Public static void GarbageCollect (){GC. Collect ();GC. WaitForPendingFinalizers ();GC. Collect ();}Public static void

C # code example of string inversion implemented by Algorithm

When using StringBuilder, note that you should specify the initial capacity when constructing the StringBuilder object. Otherwise, the default capacity is 16 characters. When the default capacity is exceeded due to append characters, A new string

Introduction to the System. Data. DataRowCollection class

Let's take a look at the following program: 01: using System;02: using System.Data;03: using System.Linq;04: 05: namespace Skyiv.Ben06: {07: class Program08: {09: static void Main()10: {11: var dt = new DataTable();12:

C # How to run only one instance Program

A mutex process (Program), simply put, is to run only one instance of the program in the system. currently, many software have this function. For example, Maxthon can be set to "open only one form" or Bitcomet. I also saw this feature of these

C # code execution at intervals (multithreading)

Summarize the following three methods to implement c # code execution at intervals: Method 1: Call the thread execution method to implement an endless loop in the method. Set the Sleep time for each loop; Method 2: Use the System. Timers. Timer

Search startup Item c #

Imported space name: Microsoft. win32 Add listbox. Code: Private void Form1_Load (object sender, EventArgs e){Foreach (string name in GetRegistName ()){ListBox1.Items. Add (name + ":" + GetRegistData (name ));} }Private string GetRegistData (string

C # Read and Write files

To read an object, follow these steps: 1. Declare and use the OpenRead of File to instantiate a File stream object, as shown below: 2. Prepare a byte array for storing the file content. fs. Length will get the actual size of the file, as shown below:

C # generate code instances without repeated random numbers

You can consider placing these 100 numbers in a single number group and randomly taking a location (the first time is 1-100, the second time is 1-99 ,...), you can compare the number of the position with the number of the last position.Using

C # implement automatic scaling of controls as the form is dragged

C # code: Public void AutoScale (Form frm){Frm. Tag = frm. Width. ToString () + "," + frm. Height. ToString ();Frm. SizeChanged + = new EventHandler (frmScreen_SizeChanged );} Private void frmScreen_SizeChanged (object sender, EventArgs e){String []

C # play audio files

First, apply wmp. dll under C: WINDOWSsystem32 to the project; WMPLib. WindowsMediaPlayerClass player = new WMPLib. WindowsMediaPlayerClass ();Player. URL = @ "F: ding.wav ";Player. uiMode = "None ";Player. settings. volume = 100;Player. settings.

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