Why Don't Lambda Expressions Support Ref Parameters?

Why Lambda Expressions Disallow Ref Parameters

Lambda expressions offer the convenience of capturing variables from their enclosing context. However, the use of ref parameters within lambda expressions introduces complexities that conflict with the intended behavior of both.

Ref parameters, as their name implies, allow the passed variable's reference to be assigned to a different value, potentially extending its lifetime beyond the current method's scope. This behavior contradicts the expected short-lived nature of lambda expressions.

Lambda expressions also enable variables captured from the enclosing context to be modified, potentially leading to unexpected side effects in the calling code. This characteristic conflicts with the fundamental concept of ref parameters, which ensures that modifications to the reference will be reflected in both the method and the caller.

The inherent incompatibility between lambda expressions and ref parameters arises from their contrasting lifespans and the potential for undesirable side effects. To maintain clarity and avoid unexpected behavior, lambda expressions intentionally disallow the use of ref parameters.

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