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C# interview questions: What Are Generics in C#?
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What Are Generics in C#? Introduction: English: Generics in C# provide a way to define classes, methods, and interfaces with placeholder types, allowing you to create flexible and reusable code. Instead of specifying a specific data type, generics let you use a type parameter, which can be replaced with any…
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C# interview questions: What Is the Difference Between `Func`, `Action`, and `Predicate` Delegates in C#?
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What Is the Difference Between Func, Action, and Predicate Delegates in C#? Introduction: English: In C#, Func, Action, and Predicate are built-in generic delegates that represent methods with different signatures. They are commonly used for passing methods as parameters in a simplified way, avoiding the need to declare custom delegate…
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C# interview questions: How do you implement event handling in C#?
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How do you implement event handling in C#? Introduction: English: Event handling in C# is a programming model where an event (an action or occurrence) triggers the execution of code. Events are integral to creating responsive applications, especially in GUI environments like Windows Forms and WPF. Events rely on delegates,…
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C# interview questions: What is a delegate, and how does it work in C#?
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What is a delegate, and how does it work in C#? Introduction: English: A delegate in C# is a type that represents references to methods with a specific signature. Delegates allow methods to be passed as arguments, making them essential for event-driven programming and callback mechanisms. Essentially, a delegate acts…
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C# interview questions: What is Reflection in C# and How is It Used?
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What is Reflection in C# and How is It Used? Introduction: English: Reflection in C# is a powerful feature that allows programs to inspect and manipulate objects, methods, and types at runtime. It enables dynamic type discovery, making it possible to interact with assemblies, retrieve metadata, and even invoke methods…
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C# interview questions: How does the `yield` keyword work in C#?
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How Does the yield Keyword Work in C#? Introduction: English: The yield keyword in C# is used to simplify the implementation of iterators. It allows methods to return elements one at a time without storing them all in memory. This is particularly useful when dealing with large data collections or…
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C# interview questions: What is covariance and contravariance in C#?
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Covariance and Contravariance Introduction: English: Covariance and contravariance are two important concepts in C# that allow for flexible type assignment, especially when working with generics, delegates, and interfaces. Covariance enables a method to return a more derived type, while contravariance allows a method to accept a more general type. Chinese:…
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C# interview questions: How do you implement a thread-safe singleton pattern in C#?
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Implementing a Thread-Safe Singleton Pattern in C Introduction: English: The Singleton pattern ensures that a class has only one instance and provides a global point of access to it. In multithreaded environments, ensuring that this instance is created safely without issues such as race conditions is crucial. The thread-safe Singleton…
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C# interview questions: What is the difference between value types and reference types in C#?
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Difference Between Value Types and Reference Types in C C# 中值类型和引用类型的区别 Introduction: English: In C#, value types and reference types represent two distinct ways that data is stored in memory. Value types directly store data, whereas reference types store references to the data in memory. Understanding these differences is key…
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C# 101: Extension Methods in C#
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What Are Extension Methods in C#? (C# 中的扩展方法是什么？) Extension methods in C# allow developers to "add" methods to existing types without modifying the original type’s source code. This is achieved by defining a static method in a static class, with the first parameter of the method specifying the type to…