Câu hỏi phỏng vấn C#
Câu hỏi

What is LINQ in C#?

Câu trả lời

LINQ (Language Integrated Query) is a powerful feature in C# that allows you to query and manipulate data from various sources using a consistent syntax. It provides a set of extension methods and query operators that enable you to write expressive and type-safe queries against collections, databases, XML documents, and other data sources.

Here are the key points about LINQ in C#:

Benefits of LINQ

  1. Unified query syntax: LINQ provides a consistent syntax for querying data, regardless of the data source.
  2. Type safety: LINQ queries are type-safe, which means that errors can be caught at compile-time rather than at runtime.
  3. Deferred execution: LINQ queries are executed only when the result is accessed, allowing for efficient processing of large data sets.
  4. Extensibility: LINQ can be extended to support custom data sources through the use of LINQ providers.

LINQ Operators

LINQ provides a set of standard query operators that can be used to perform various operations on data, such as filtering, sorting, grouping, and projecting. Some of the most commonly used LINQ operators include:

  • Where: Filters a sequence based on a pred...
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