.net knowledge structure
.NET introduces Microsoft .NET strategy and technology system, .NET Framework Class Library (FCL), Common Language Runtime (CLR), Common Type System (CTS), Common Language Specification (CLS), Assembly (Assembly), Application Domain. Understand the Microsoft .net technology framework.
1. C# Programming 1. Introduction to C# language
(1) Basic concepts: types, variables, conditional judgments, loops, type conversions, expressions, statements, and namespaces.
(2) Object-oriented programming: classes, structures, enumerations, abstract classes, interfaces, properties, inheritance and derivation, method overriding, method overloading events and delegation, delegation declaration, asynchronous delegation, event declaration, event subscription. C# exception handling: exception overview, handling mechanism. NET garbage collection mechanism, cleaning up unmanaged resources, forced garbage collection, generics, anonymous methods, iterators, partial types, and nullable types. Master C# syntax, object-oriented programming methods, C# exception handling, garbage collection, and language features.
2. C# language advanced algorithms and data structures.
⑴ Files and data flows: IO overview, basic file operations, file compression/decompression, file monitoring, file encryption/decryption, independent storage.
⑵ Multi-threading: Basic concepts of multi-threading, creating threads, thread life cycle and control, thread scheduling, mutual exclusion and synchronization, and thread pools.
⑶ Reflection and attributes: Overview of reflection, uses and application fields of reflection, dynamically loading assemblies, dynamic method invocation, using reflection to achieve polymorphism, customizing attributes for classes, and customizing attributes for methods.
⑷ .NET assembly: Assembly overview, version control, strongly named assemblies, global assembly cache, global/private deployment of assemblies, assembly security, use of resource files. Master algorithms and data structures, C# file stream operations, multi-threaded programming, reflection principles, assembly concepts and their deployment methods.
3. C# Advanced Programming
⑴ Network programming: Use Socket, TCP, UDP for network communication and data transmission.
⑵ C# and XML: DDT, XSD, C#’s XML API, System.Xml namespace, XmlReader, XmlWrieter, XML navigation, XML XSL conversion.
⑶ Serialization/deserialization: Overview of serialization, binary serialization, XML serialization.
⑷ NET remoting (Remoting): remote objects, channel registration, service registration, lease and lifetime control, asynchronous remote calls, remote object security, authentication and authorization. Master network communication programming, use XML in C#, various forms of object serialization,. NET remoting framework.
Stage project (MSN V1.0) Develop a chat tool similar to MSN. Realize the functions of peer-to-peer chatting, file transfer, sending emails and text messages. Master network programming technology, multi-threading technology, and IO programming technology in C#.
4. Software engineering OOAD and UML object-oriented analysis and design, UML syntax, design patterns. Use of Visual Studio Enterprise Architecture Edition. Master design patterns and master object-oriented analysis and design methods.
5. Data access technology and database programming⑴. SQLServer2008 usage and development
Basic knowledge of database, basic DDL, DCL, DML statements, indexes, constraints, views, using T-SQL to write triggers, stored procedures, cursors, and functions. According to SQLServer. NET support, use C# language to write database objects, SQLServer has built-in support for XML, and use SQLSever Reporting Services. Learn the use of SQLServer2008 database, master T-SQL programming, and use C# to write database objects.
⑵ADO.NET
The design goals of ADO.NET: ADO.NET structural system, NET Framework data provider and DataSet, base class-based provider model, DataSet usage methods and techniques, DataSet XML serialization and binary serialization . DataSet Designer, TableAdapter, Asynchronous Processing in data access, performance optimization of Bulk Copy Operations, Multiple Active ResultSets. Master the data access technology ADO.NET on the .NET platform. 6. Windows application development⑴. Windows Form development
Overview of Windows Form: forms, controls, common controls, mouse and keyboard events, container controls, menus and toolbars, commonly used components, and common dialog boxes.
⑵ Windows Form advanced programming: program interaction, custom controls, graphics and image processing, registry programming, use of data binding controls, Crystal Report Designer, application packaging and deployment, Click Once deployment method. Master Windows Forms application design and use of various controls. Master the packaging and deployment of Windows applications.
⑶ Windows service development: Overview of Windows services, Windows service architecture, processing Windows service events, implementing interactive Windows services, and installing and deploying Windows services. Master the development and deployment of Windows service programs.
Phase project (MSN V2.0) uses ADO.NET and SQLSever to upgrade the previous version of MSN project to implement server registration and login functions, add and block contacts, offline messages and other advanced functions to achieve a complete version of MSN. Master ADO.NET and SQLSerer database programming technology.
7. Web application development⑴. Introduction to ASP.NET development ASP.NET overview: ASP.NET page framework, ASP.NET event model.
⑵ ASP.NET controls use: Web controls, HTML controls, validation controls, data binding controls, and data source controls.
⑶ New features of ASP.NET: MasterPage, Skin Theme, website navigation, Profile mechanism, WebPart member role management (MemberShip RoleManager). master. NET using ASP.NET to develop Web applications, the basic operating principles of ASP.NET, and the controls of ASP.NET.
ASP.NET advanced development ASP.NET session state management (InProcess, StateService, SQLServer), development of user controls and custom controls, use of HttpMoudle and HttpHandler, internationalization of ASP.NET applications, development of ASP.NET Web Service , Web2.0 development based on ASP.NET AJAX, using Crystal Report in ASP.NET, ASP.NET caching mechanism and strategy (Page Cache, Data Cache), integration of IIS6.0 and ASP.NET Application, security architecture, authentication and policy, Web application security programming and configuration, ASP.NET performance and optimization principles, and performance improvement techniques. Master the advanced development skills of ASP.NET, including state management, caching strategies, security models, performance tuning, crystal reports, etc. Learn to use Ajax in ASP.NET, learn in. Develop WebServices in NET. Stage project (eBuy) Develop a B2C e-commerce website to implement online browsing, shopping cart, ordering goods, online banking payment, favorites, order management, and back-end business management. Covers all business processes of large B2C sites. Mainstream web development technologies including ASP.NET, AJAX, ADO.NET, and WebServices are used. Master through project development practice. NET platform for web development.
8.NET enterprise-level application development technology. ⑴.NET enterprise application development WSE (Web Service Enhancements), Web service security, asynchronous Web services, the use of message queue (MSMQ), Microsoft Enterprise Library (Microsoft Enterprise Library), COM+ services, distributed transaction processing, based on WebService distributed architecture, based on. NET Remoting's distributed architecture. Learn to use. NET enterprise services, framework for developing distributed solutions... NET's latest new technology, new features of C# 3.0: Lambda expressions, LINQ language integrated query. .NET Framework3.0 new technologies: inter-service communication technology WCF (Windows Communication Foundation), presentation layer technology WPF (Windows Presentation Foundation), workflow development WWF (Windows WorkFlow Foundation). Learn the new technologies of .NET3.5 version launched by Microsoft.

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C#.NET interview questions and answers include basic knowledge, core concepts, and advanced usage. 1) Basic knowledge: C# is an object-oriented language developed by Microsoft and is mainly used in the .NET framework. 2) Core concepts: Delegation and events allow dynamic binding methods, and LINQ provides powerful query functions. 3) Advanced usage: Asynchronous programming improves responsiveness, and expression trees are used for dynamic code construction.

Testing strategies for C#.NET applications include unit testing, integration testing, and end-to-end testing. 1. Unit testing ensures that the minimum unit of the code works independently, using the MSTest, NUnit or xUnit framework. 2. Integrated tests verify the functions of multiple units combined, commonly used simulated data and external services. 3. End-to-end testing simulates the user's complete operation process, and Selenium is usually used for automated testing.

C# is a modern, object-oriented programming language developed by Microsoft and as part of the .NET framework. 1.C# supports object-oriented programming (OOP), including encapsulation, inheritance and polymorphism. 2. Asynchronous programming in C# is implemented through async and await keywords to improve application responsiveness. 3. Use LINQ to process data collections concisely. 4. Common errors include null reference exceptions and index out-of-range exceptions. Debugging skills include using a debugger and exception handling. 5. Performance optimization includes using StringBuilder and avoiding unnecessary packing and unboxing.

C#.NETisversatileforbothwebanddesktopdevelopment.1)Forweb,useASP.NETfordynamicapplications.2)Fordesktop,employWindowsFormsorWPFforrichinterfaces.3)UseXamarinforcross-platformdevelopment,enablingcodesharingacrossWindows,macOS,Linux,andmobiledevices.

C#.NET is still important because it provides powerful tools and libraries that support multiple application development. 1) C# combines .NET framework to make development efficient and convenient. 2) C#'s type safety and garbage collection mechanism enhance its advantages. 3) .NET provides a cross-platform running environment and rich APIs, improving development flexibility.

Interview with C# senior developer requires mastering core knowledge such as asynchronous programming, LINQ, and internal working principles of .NET frameworks. 1. Asynchronous programming simplifies operations through async and await to improve application responsiveness. 2.LINQ operates data in SQL style and pay attention to performance. 3. The CLR of the NET framework manages memory, and garbage collection needs to be used with caution.

C#.NETissuitableforenterprise-levelapplicationswithintheMicrosoftecosystemduetoitsstrongtyping,richlibraries,androbustperformance.However,itmaynotbeidealforcross-platformdevelopmentorwhenrawspeediscritical,wherelanguageslikeRustorGomightbepreferable.

Security best practices for C# and .NET include input verification, output encoding, exception handling, as well as authentication and authorization. 1) Use regular expressions or built-in methods to verify input to prevent malicious data from entering the system. 2) Output encoding to prevent XSS attacks, use the HttpUtility.HtmlEncode method. 3) Exception handling avoids information leakage, records errors but does not return detailed information to the user. 4) Use ASP.NETIdentity and Claims-based authorization to protect applications from unauthorized access.
