Anonymous new event handler with lamda

In C#, you can create an anonymous event handler using a lambda expression. Here's an example:

button.Click += (sender, e) => Console.WriteLine("Button clicked!");

In this example, the lambda expression (sender, e) => Console.WriteLine("Button clicked!"); is an anonymous method that will be called when the Click event is raised on the button object.

Here's a breakdown of the lambda expression:

• (sender, e) is the input parameter list, which matches the signature of the event handler method. In this case, the method takes two parameters: sender (the object that raised the event) and e (the event arguments).
• => is the lambda operator, which separates the input parameters from the method body.
• Console.WriteLine("Button clicked!"); is the method body, which is the code that will be executed when the event is raised.

By using a lambda expression, you can create a concise and expressive event handler without having to declare a separate method.

Note that you can also use a lambda expression to create an event handler that takes no parameters, like this:

button.Click += () => Console.WriteLine("Button clicked!");

In this case, the lambda expression takes no input parameters, and the method body is simply Console.WriteLine("Button clicked!");.