c#

Delegates and events are used in C# to implement the Observer design pattern, which allows objects to communicate with each other in a loosely coupled manner. Delegates are used to define the signature of the method(s) that can be called, while events are used to subscribe and unsubscribe to these methods. A delegate is a …

is a query language that allows developers to query data from different data sources, such as databases, collections, or XML documents. It is integrated into C# and provides a unified syntax for querying different types of data. LINQ queries are similar to SQL queries, but they are written in a C# syntax with a fluent …

Arrays and collections are data structures that can store multiple values in a single variable. They are useful when you need to work with multiple values of the same type. Arrays: – Arrays are fixed in size and have a specific order. – You can access individual elements with an index. – Arrays can be …

In C#, a string is a sequence of characters, and it is represented using the `string` data type. Here are some common operations and methods you can perform on strings in C#: 1. Creating a string: You can create a string by enclosing a sequence of characters in double quotes. For example: “`csharp string name …

In C#, file I/O can be performed using the classes in the System.IO namespace. There are various classes available for different file operations like reading, writing, copying, deleting, etc. Here are some examples: 1. Reading from a File: “`csharp string filePath = “path/to/file.txt”; string content = File.ReadAllText(filePath); Console.WriteLine(content); “` 2. Writing to a File: “`csharp …

Exception handling is a mechanism in C# that allows you to handle and manage runtime errors or exceptions that occur during the execution of a program. In C#, exceptions are objects that are instances of classes derived from the built-in Exception class. When an exception occurs, an object of the appropriate exception class is thrown …

Interfaces and abstract classes are both ways to define the behavior and structure of classes in object-oriented programming. While they have some similarities, there are also some key differences between the two. Interface: – An interface is a collection of abstract methods that defines a contract for classes to implement. – It specifies the methods …

Inheritance is a feature of object-oriented programming that allows a class to inherit properties and methods from another class. The class that is being inherited from is called the parent class or base class, and the class that is inheriting is called the child class or derived class. Inheritance allows the child class to reuse …

In object-oriented programming, a class is a blueprint or template for creating objects. It defines the properties (attributes) and behaviors (methods) that the objects will have. An object, on the other hand, is an instance of a class, meaning it is created based on the class definition. Classes and objects are fundamental concepts in object-oriented …

Object-Oriented Programming (OOP) is a programming paradigm that uses objects to represent real-world entities and provides mechanisms to manipulate these objects. C# is an object-oriented programming language that supports various OOP concepts. The main concepts of OOP in C# are: 1. Classes: A class is a blueprint for creating objects. It contains the definition of …