In what ways do you make use of C# Lambda Expressions? [closed]

Question

Pour in your posts. I'll start with a couple, let us see how much we can collect.

To provide inline event handlers like

button.Click += (sender,args) =>
{
};

To find items in a collection

 var dogs= animals.Where(animal => animal.Type == "dog");

For iterating a collection, like

 animals.ForEach(animal=>Console.WriteLine(animal.Name));

Let them come!!

Answer 1

Returning an custom object:

var dude = mySource.Select(x => new {Name = x.name, Surname = x.surname});

Answer 2

One line function

Func<int, int> multiply = x => x * 2;
int y = multiply(4);

Answer 3

Here's a slightly different one - you can use them (like this) to simulate the missing "infoof"/"nameof" operators in C# - i.e. so that instead of hard-coding to a property name as a string, you can use a lambda. This means that it is validated at compile time (which strings can't be).

There is obviously a performance cost to this, hence "just for fun", but interesting...