C# Lambda expressions: Why should I use them?

Question

I have quickly read over the Microsoft Lambda Expression documentation.

This kind of example has helped me to understand better, though:

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Answer 1

The innovation is in the type safety and transparency. Although you don't declare types of lambda expressions, they are inferred, and can be used by code search, static analysis, refactoring tools, and runtime reflection.

For example, before you might have used SQL and could get an SQL injection attack, because a hacker passed a string where a number was normally expected. Now you would use a LINQ lambda expression, which is protected from that.

Building a LINQ API on pure delegates is not possible, because it requires combining expression trees together before evaluating them.

In 2016 most of the popular languages have lambda expression support, and C# was one of the pioneers in this evolution among the mainstream imperative languages.