The discard variable (_), introduced in C# 7.0, allows developers to ignore values intentionally. It enhances code clarity by signaling unused data in tuples, pattern matching, out parameters, and LINQ queries, promoting cleaner, more efficient, and maintainable programming in .NET applications.

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C# Corner

The discard variable, introduced in C# 7.0 and represented by an underscore (_), is a special, read-only variable used to ignore values intentionally. This feature can lead to more readable and maintainable code by avoiding unnecessary variables. Common usage scenarios include deconstructing tuples, pattern matching, handling out parameters, and optimizing LINQ queries. The discard variable enhances code clarity and can aid in performance optimization by reducing memory usage.

Discard Variable in C# .NET