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Language Integrated Query (LINQ), introduced in .NET Framework 3.5 and Visual Studio 2008, provides a unified query syntax directly in C# for working with data across different sources. It operates on any collection implementing IEnumerable<T> and returns a new enumerable sequence, leveraging deferred execution in many cases. Consider a t ...

How foreach Works Under the Hood The foreach statement in C# provides a convenient way to iterate through collection elements: string[] colors = { "Red", "Green", "Blue" }; foreach (string color in colors) Console.WriteLine($"Color: {color}"); Output: Color: Red Color: Green Color: Blue While this ...

Enumerators and Iterators 1. Enumerators and Enumerable Types Using the foreach Statement Arrays can provide an enumerator object on demand. An enumerator returns array elements one at a time when requested. The enumerator knows the order of items and tracks its position in the sequence. For types with enumerators, there must be a way to retrie ...

Introduction In C#, both IEnumerable and IQueryable are fundamental interfaces for working with collections of data. While they share a common ancestor and similar names, they serve distinct purposes and are optimized for different scenarios. Understanding their differences is crucial for writing efficient and scalable applications. IEnumerable ...

Language Integrated Query (LINQ) embeds query capabilities directly into the C# syntax, eliminating the impedance mismatch between programming languages and data formats. Prior to its introduction, developers relied on string-based query languages without compile-time validation or IDE assistance, requiring distinct syntaxes for SQL databases, ...

LINQ (Language Integrated Query) enables expressive, declarative data querying over collections using method syntax or query expressions. Below is a structured overview of core LINQ patterns and their practical usage. Functional Delegates: Action and Func C# provides built-in generic delegates to represent functions without defining custom dele ...