DependencyInjection(DI)inC#isadesignpatternthatenhancesmodularity,testability,andmaintainabilitybyallowingclassestoreceivedependenciesexternally.1.DIpromotesloosecouplingbydecouplingobjectcreationfromusage.2.Itsimplifiestestingthroughmockobjectinject

In the booming cryptocurrency market, choosing a suitable trading platform is crucial to users. For novice or professional traders who want to participate in digital asset trading in 2025, Binance and Huobi HTX are two highly-watched choices. Understanding the characteristics and differences between these two platforms will help make decisions that are more in line with individual needs.

To access and use the Ouyi OKX platform, please register an account through the official website, complete identity verification, set security measures, understand trading products, master fund operations, be familiar with the fee structure, use interface tools and obtain customer support. 1. Visit the official website www.okx.com to register, provide email or mobile phone number and set password; 2. Complete KYC identity verification to improve transaction permissions; 3. Enable Google verification, mobile phone verification and other security functions to ensure account security; 4. Use spot, leverage, contracts and other trading products; 5. Pay attention to the verification address when recharging and withdrawing digital assets or fiat currency; 6. Understand the structure of transaction and withdrawal fees, and reasonably control costs; 7. Be familiar with K-line charts, order books and other tools to improve transaction efficiency; 8

Leading digital currency trading platforms in 2025 include Binance, OKX, gate.io and Huobi. 1. Binance is leading in terms of extensive trading services, multi-layer security mechanisms, high liquidity and ecological construction; 2. OKX is known for its powerful derivative trading functions, good liquidity and public chain support; 3.gate.io is favored for supporting a large number of digital currencies, early-stage project investment opportunities and reasonable fees; 4. Huobi maintains its influence with its huge user base, diverse trading products and compliant operations.

SOLID principle is five design principles to improve code maintainability and scalability in object-oriented programming. They are: 1. The single responsibility principle (SRP) requires that the class only assumes one responsibility, such as separating report generation and email sending; 2. The opening and closing principle (OCP) emphasizes that the extension is supported through interfaces or abstract classes without modifying the original code, such as using the IShape interface to realize area calculation of different graphics; 3. The Richter replacement principle (LSP) requires that the subclass can replace the parent class without destroying logic, such as Square should not mistakenly inherit Rectangle, resulting in abnormal behavior; 4. The interface isolation principle (ISP) advocates the definition of fine-grained interfaces, such as split printing and scanning functions to avoid redundant dependencies; 5. The dependency inversion principle (DIP) advocates the

Expression trees are used in C# to represent code as data. They enable developers to analyze, modify, or runtime to generate new code by building a tree structure that describes code operations rather than executing code directly. Its core components include parameter expressions, binary expressions, and lambda expressions. Common uses are LINQtoSQL and ORM (such as EntityFramework), where the expression tree enables C# LINQ queries to be translated into SQL statements. Other uses include dynamic filtering and querying, serialization or scripting systems, simulation frameworks, and dependency injection containers. However, it is more appropriate to use normal functions or lambda expressions without the need for inspection or conversion logic. 1. Construct dynamic query; 2. Translate it into other forms

CustomAttributes are mechanisms used in C# to attach metadata to code elements. Its core function is to inherit the System.Attribute class and read through reflection at runtime to implement functions such as logging, permission control, etc. Specifically, it includes: 1. CustomAttributes are declarative information, which exists in the form of feature classes, and are often used to mark classes, methods, etc.; 2. When creating, you need to define a class inherited from Attribute, and use AttributeUsage to specify the application target; 3. After application, you can obtain feature information through reflection, such as using Attribute.GetCustomAttribute();

Huobi HTX is a world-renowned digital asset trading platform that provides safe, professional and convenient trading services. 1. Provide a wide range of digital asset trading pairs, covering mainstream and emerging tokens; 2. Support diversified trading services such as spot, leverage, contracts, options; 3. Use multiple security measures such as hot and cold wallet separation, multiple signatures to protect user assets; 4. Independently develop high-performance matching systems to ensure rapid transaction execution; 5. Actively layout the global market and comply with local regulatory policies; 6. The interface is intuitive and easy to use, providing professional charts and analysis tools, etc.