How is the usage of action in C#?

In C#, an Action is a delegate type that can be used to reference methods that do not return a value. Actions can take between 0 and 16 parameters, and do not return any value.

The usage of “Action” is as follows:

1. Declare an Action delegate type.
2. Action called action;
   Action with integer called actionWithInt;
   Action with string and integer called actionWithStringAndInt;
3. Instantiate an Action object and assign it to a delegate variable:
4. Action without parameters is defined as a function that outputs a message to the console.
5. Call to Action:
6. action(); // Output: Action without any parameters
   actionWithInt(10); // Output: Action with integer parameter: 10
   actionWithStringAndInt(“Hello”, 20); // Output: Action with string and integer parameters: Hello, 20

Actions can be used to perform any operation that does not return a value, such as printing messages or updating states. It is a versatile type of delegate that is very convenient for handling different parameters and function signatures.