LINQ extension methods - any() vs. where() vs. exists() - LINQ extension methods - any() vs. where() vs. exists()

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problem ：

Unfortunately the names of these methods make terrible search terms, and I've been unable to find a good resource that explains the difference between these methods--as in when to use each. Unfortunately , The names of these methods produce terrible search terms , And I have been unable to find good resources to explain the differences between these methods - Just like when to use each method .

Thanks. thank you .

Edit: edit ：

The sort of query that I'm trying to fully understand is something like this: The kind of query I'm trying to fully understand is this ：

context.Authors.Where(a => a.Books.Any(b => b.BookID == bookID)).ToList();

And thanks to all who've answered. Thanks to all who answered .

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Solution ：

Reference resources ： https://stackoom.com/en/question/FXNw